- 10 hours ago
Discover 15 hidden engineering features built into everyday tools and hardware. Learn why engineers added notches, slots, caps, and other physical overrides to boost safety and efficiency. We’ll show you how to lock extension cords, measure solo with a tape, and free stuck padlocks. Stop wasting tools, time, and money by finally using your gear the way it was designed.
Category
🎈
FunTranscript
00:00Think you're ready to see the world in a whole new way?
00:03I hope so, because I'm about to blow your mind.
00:06Have you ever noticed those plastic lines along the side of your phone?
00:10They're the oddly space stripes that seem to have no purpose.
00:14In reality, though, they're probably your phone's most important feature.
00:18Because without them, your device would be little more than a smart paperweight.
00:23They are antenna lines, allowing your phone to remain wireless.
00:28Electromagnetic waves carrying phone, Bluetooth, and Wi-Fi signals cannot pass through metal,
00:33which makes up most of the phone's outer case.
00:36And the glass panel up front also slows those waves down.
00:39It's like there's a bouncer at the door, refusing to let most signals in or out of the phone.
00:44Hey, I've been to that nightclub.
00:46Anyway, that means no phone calls, no text, and no late-night delivery
00:51when you have nothing in the fridge except one egg and something that might have once been lasagna.
00:56Those little strips of plastic allow the same electromagnetic waves to come and go as they please.
01:02This is why you can call a friend, order a ride, or play an online matching game until 3 in
01:07the morning.
01:07Hey, don't you have to get up early for work?
01:10When you do finally stumble out of bed, make sure you're using this next item correctly
01:15to avoid a potentially upsetting situation.
01:18The zipper, originally patented as the clasp locker in 1851, didn't become widely used until the 1930s.
01:27Now, they're on everything, from bags to jackets to jeans.
01:31And they're not perfect.
01:32They get stuck.
01:33They pinch the skin.
01:35And we all know what happens if the zipper on our pants refuses to stay up.
01:39Well, luckily, this can be avoided.
01:41Most zippers have a locking mechanism built right in.
01:44When the zip is facing down and flat against the teeth, the lock is engaged and the zipper remains closed.
01:51If only I had known that back in school.
01:54What about those metal rivets most jeans have?
01:57They're more than a design choice.
01:59They were added to protect areas that experience the most strain, such as pocket corners and the base of the
02:05fly.
02:06The rivets hold the fabric together, even when it's being stretched and pulled during work.
02:10And since we're talking about clothing, have you ever wondered about that tiny fifth pocket at the front of your
02:16jeans?
02:17Well, first of all, it isn't really a fifth pocket.
02:20Originally, jeans were made with four pockets, including that little one in front.
02:25The fifth pocket is actually the one on the back left, which was only added to jeans in 1901.
02:31The little pocket, though, was important a long time ago.
02:35Cowboys needed to keep their pocket watches safe while riding out on the range.
02:39Yeehaw!
02:40That pocket kept the watches protected, but also handy.
02:43And then, people became so used to it that jeans just look weird without one.
02:48Another strange holdout from a bygone day is that stitched V on the front of some sweatshirts.
02:54What if I told you that those exact stitches hold the whole shirt together?
02:58Well, then I would be lying, and I never do that.
03:02But, back in the 1940s, this V was very useful.
03:06First, the V-stitch was initially used to add a patch of stretchy rib fabric to the shirt
03:12so that it could fit over our big heads more easily.
03:15Secondly, these shirts were specifically designed for sports.
03:18So, the V included an additional piece of fabric to absorb the sweat that would build up during a game
03:24or a workout.
03:25As stretchy fabric became readily available and better at handling perspiration, the V lost its traditional value.
03:33But, like the tiny jean pocket, it has continued as a decorative feature.
03:37A reminder of our big-headed ancestors who apparently only sweated just below the chin.
03:43But, moving on.
03:45One place you won't find many people sweating is the golf course.
03:48You will see quite a few fashion disasters, sure.
03:52But sweat?
03:53Not so much.
03:54Golf was invented around the 16th century in Scotland.
03:57Back then, the ball was perfectly round and smooth.
04:00Over time, the ball would become dented from use.
04:03And at some point, golfers discovered that these imperfections actually helped the ball fly farther.
04:10Dimples were added on purpose in the 1900s,
04:12when it was found out that they reduced the aerodynamic drag that slowed down a smoother ball.
04:18And the dimples made the balls easier to control.
04:21And no, not all golf balls are created equal.
04:25The number of dimples can range from 300 to 500,
04:28with one company producing a ball with over a thousand little dents.
04:32Wow, a little overboard, eh?
04:34Need a quick, refreshing drink after a round of golf?
04:37Juice boxes, created back in 1963, are very convenient.
04:42But why do they have these large triangular flaps on top?
04:46Their lifted flaps act as hand grips.
04:49This stops you from accidentally squeezing a full box and spilling juice all over the place,
04:54like onto your favorite t-shirt or the new couch.
04:57Now, when you're done golfing,
04:59grab your backpack with that leather diamond patch with two vertical openings.
05:03It's commonly referred to as a lash tab.
05:06But I much prefer its other name, pig snap.
05:09I mean, it certainly looks like one.
05:12You typically find these pig snouts on pats used by hikers and climbers.
05:16The diamond is a place to tie any extra gear that they need to carry,
05:20like boots, cooking equipment, or sleeping bags.
05:22But these lash tabs are also becoming more common on smaller backpacks.
05:26They're a nod to the past, but just as useful.
05:29Attach your running shoes to one next time you head to the gym,
05:32keeping those stinky things away from the rest of your clothes.
05:35Now, I'm sure you're a great driver.
05:39But for years, you've probably been neglecting an important safety feature right in front of your eyes.
05:45That rear-view mirror has a small tab located at the bottom center.
05:49It's high time you started using it.
05:51When this is flipped forward, the mirror is in day mode,
05:54providing a strong reflection of everything behind the car.
05:57Flipping the tab backward changes the whole situation to night mode.
06:02This reduces the brightness of the headlights behind you, resulting in a safer drive.
06:07Another cool car tip?
06:09If you're borrowing from a friend, using a rental, or have the memory of a houseplant,
06:14cars feature a handy indicator to let you know which side the gas tank is on.
06:18It's a tiny arrow next to the pump icon that points either left or right.
06:23Where the arrow points, that's where the gas tank can be found.
06:27And that's one less thing you have to remember.
06:30Okay, off to the grocery store.
06:32A regular shopping cart has a useful feature you might have been overlooking.
06:36Carts usually include loops in the metal frame, often behind the child seat.
06:41As you bag your groceries, hang the ones with fragile or squishable items, like eggs or bread, on these loops.
06:48Now they're out of harm's way when you toss that giant watermelon into the cart.
06:54Later, when you're unloading your groceries, do yourself a favor and grab that box of plastic wrap.
07:00You know, the one that is impossible to unroll without the whole tube coming out while the plastic wrap sticks
07:06to itself.
07:08Check out either end of the box, and you'll see small tabs that you are supposed to push in.
07:13This helps to hold the roll in place, so you can easily pull the plastic wrap out without all the
07:19fuss.
07:20Aluminum foil boxes also have these tabs.
07:22Now that you can finally use that plastic wrap, try this appealing hack.
07:27Separate that bunch of bananas and cover each stem in some plastic wrap.
07:32The stem releases a gas called ethylene.
07:35When it reaches the rest of the banana, it encourages the fruit to ripen and turn black.
07:40If you wrap the stems, your bananas will last longer.
07:44And since you're in your kitchen, you might as well warm up that coffee from this morning.
07:49Just remove the gross skin that has formed on top.
07:52Don't eat it!
07:53Of course, as you open the microwave, you'll notice that the glass in the door has a strange black mesh
07:59inside.
08:00This mesh is designed to stop any radiation from passing through the glass.
08:05Like the electromagnetic waves we discussed earlier, radiation can't pass through metal.
08:10That mesh keeps it all safely inside to help you heat up your food.
08:14Thank you, science!
08:16Oh, and about that cup of coffee.
08:18Did you know that the handle size can help you determine how much the mug actually holds?
08:23Let your fingers guide you.
08:25If you can fit two fingers into the handle, then the mug holds 8 ounces or one measuring cup of
08:30liquid.
08:31Three fingers, 10 ounces or one and a quarter cups.
08:35Four fingers, 12 ounces or one and a half cups.
08:38Pretty cool, huh?
08:41So, making a mistake with a pencil is easy to fix.
08:44You just use the pink side, right?
08:47And with ink, you just flip the eraser and use the blue part.
08:51Wrong!
08:51And you just wrecked a perfectly good piece of paper.
08:54That's because the blue part is actually also for pencil.
08:58Mind blown!
08:59The blue side of the eraser is for erasing mistakes on thicker paper,
09:04where the softer pink side just can't get the job done.
09:08A vegetable peeler isn't just for potatoes or carrots.
09:11You can use it to shave off thin slices of onion.
09:15Hey, I just saved you time, stress, and a whole bunch of tears.
09:19It's also good for cutting perfect thin slices of cheese.
09:24Everything is better with cheese.
09:26The diagonal leather patch on backpacks isn't just for decoration.
09:31It's there to hold your nasty shoes.
09:34Backpacks are made for the outdoors, with pockets to hold water bottles, pens, maps, coins, and maybe even tiny dogs.
09:42So, it makes sense to tie up your muddy shoes on the outside of your bag.
09:48Placing a wooden spoon across the top of a pot of pasta can stop it from turning into a volcano
09:54situation.
09:55The bubbles get all confused when they come into contact with the spoon's water-repelling surface.
10:01And they retreat back into the pot, victory!
10:04Less mess, and more pasta!
10:07If you're pre-rinsing your dishes like you were told to, you might be getting worse results from your dishwasher.
10:14Most modern dishwashers have sensors inside them to sense how dirty your plates are.
10:20Then they unleash a controlled jet of water to get all of that stuff off.
10:25Scrape any solid food into your compost bin and stack them up properly.
10:29Let the dishwasher do the hard work.
10:33Dropping an open juice box can turn a relaxing sundae into a day of cleaning up a sticky mess.
10:39The manufacturers know how you feel and how clumsy you can be.
10:43That's why they put little handles on the cartons.
10:46Flip up the flaps at the top of the juice box.
10:49Okay, now you can totally space out.
10:53Blenders are designed to have the liquids put in first.
10:56To make the perfect smoothie, add your milk, coconut water, yogurt, or whatever you use in first.
11:03Then your berries and spinach and whatever.
11:06You can thank me later.
11:07You're welcome.
11:09Ever pull the foil lid off a pudding or one of those mini applesauce things and realize you don't have
11:16a spoon with you?
11:17Don't worry, there's a trick for that, hidden in the foil.
11:21Give it a little fold and it's good to go.
11:24Now, it's not really a spoon, more of a mini shovel, but it gets the job done.
11:30Or you can use your fingers instead.
11:33No.
11:34No more sacrificing your fingernail on that key ring your friend got you in Cabo.
11:39For a frustration-free way to add a new key to your ring,
11:44grab a staple remover and wedge its teeth between the coils.
11:48Create even more space by pressing down.
11:51Now, there's no need to cry over spilled milk.
11:55Pouring milk out of a carton can sometimes lead to messy accidents.
11:59Unless you use this simple trick, turn the carton around and pour it out that way.
12:05What?
12:06It may seem weird, but once you try it, you'll never go back.
12:10Have you ever tried to pull out a square of plastic wrap
12:14only to have the whole roll jump out of the box in excitement?
12:18Not anymore.
12:19Or, there's little cardboard tabs on the sides to hold the tube in place,
12:24making it easy to glide the film out.
12:27Just push them in and never be frustrated again.
12:31Never!
12:33Using a plunger on a clogged kitchen sink or toilet can be annoying.
12:37But have you really got the right tool for the job?
12:41One is the standard bowl-shaped rubber head.
12:44This is perfect for flat surfaces like a sink or a tub.
12:48The other one has a narrower head on it, specifically designed for toilet pipes.
12:54Having a cold drink on a hot summer's day is so refreshing.
12:58But what do you do if your soda bottle is still warm?
13:02Cry?
13:02The always-handy paper towel is here to save the day.
13:07Wet the towel, wrap it around the bottle, and place it in the freezer for 15 to 20 minutes.
13:13Presto!
13:14A nice cold beverage.
13:16When you look at a check and see MP near the signature line,
13:20it means the check printer used micro-print as an extra security feature.
13:25To the untrained eye, it looks like a normal line.
13:28Tricky stuff.
13:30Elevators have many tricks up their sleeves.
13:33Not that they actually wear coats or anything.
13:36Pressing the floor button twice to turn it off?
13:39Holding the closed door button and your floor together to get an express ride?
13:44Does that actually work?
13:46But what about that secret hole in the outside door?
13:49Is someone looking in on your bored, resting elevator face?
13:53As cool as that would be,
13:55it's only for maintenance people to open the elevator and fix any problems.
14:00Cutting cherry tomatoes can be extremely boring.
14:03One tomato at a time.
14:05Surely, there's a quicker way to do this.
14:08Well, try placing a bunch of them between two plates.
14:12Slice in between and enjoy perfectly cut cherry tomato halves.
14:17The colored tags used to seal bread tell you which day of the week the bread was baked on.
14:23Who would have guessed?
14:24The coating makes it easier for shops to remove older loaves from the shelves.
14:30But bread tags can do more than keep your favorite loaf sealed.
14:35Grabbing the right cord from behind the TV is all about luck.
14:38Until now.
14:40Use the old bread tags as indicators to quickly find the cord you want.
14:45Look at some of those loose coins in your jar by the door.
14:49Notice those ridges?
14:50Back in the 18th century, people would file coins down, round up the shavings, and mint their own coins later.
14:58To stop this, the U.S. Mint decided to put ridges on the coins to show if they've been tampered
15:04with.
15:04Now, it's just tradition.
15:07The indent at the bottom of wine bottles is called a punt.
15:12The punt makes the wine bottle stronger, so if they're dropped, the cork won't fly across the room with all
15:18that pressure.
15:19Now, takeaway sodas have a built-in coaster.
15:22Where, you might ask?
15:24The lid, of course.
15:26Place the lid down on a table under your drink to avoid any of those annoying condensation rings.
15:33Wooden hangers aren't just great for the environment.
15:35They'll save your clothes, too.
15:37If you have pine or cedar hangers laying around, keep them in the closet with all the others.
15:43The secret behind wooden hangers is that they'll keep moths off your clothes and make them smell fresh, too.
15:50Only a few people know the secret of getting your to-go ketchup out of the bottle without wasting any.
15:56So, tap that number 57 sweet spot to get a perfect, what's the word, dollop.
16:03Don't waste your strawberries by cutting off the top.
16:06Use a straw and push through from the bottom of the strawberry.
16:10Now, enjoy a tasty cylinder of strawberry goodness.
16:14Just don't eat the leaves.
16:16The brushes on the sides of escalators aren't for cleaning your shoes.
16:20But they do do a great job.
16:23The nylon brushes stop us from getting caught on the side of the escalator by tickling our ankles.
16:29Interesting trick.
16:31Many screwdrivers can be used with a wrench to create more torque.
16:35Just place the wrench over the handle of the screwdriver, and you'll use a lot less force than you would
16:41have before.
16:42It also makes it easier to get to those hard-to-reach areas.
16:46Flip any Tupperware container over, and you'll likely see a few symbols.
16:51These are to show you if they're dishwasher safe, if they can be microwaved or frozen, and how to recycle
16:58them.
16:58So, it turns out, we've been opening bananas wrong for way too long.
17:03Instead of opening up at the stem, turn them upside down and peel from the bottom.
17:09It opens much easier that way.
17:11That's how monkeys eat them, so how do we get it so wrong?
17:16Analog watches can do much more than tell time.
17:19If you need to step away from your computer a bunch of times, but don't want to have to keep
17:24logging back in,
17:26place your mouse over the top of your analog watch.
17:29The mouse will read the ticking second hand and keep your computer screen from turning black.
17:36Extension cords can easily frustrate anyone.
17:39Just as you start getting into a rhythm, the power cuts out.
17:43The best way to avoid this is simple.
17:45Builders use this trick all the time.
17:47Tie the ends together, and they'll never disconnect again.
17:52Keychain bottle openers aren't just for kids, you know.
17:56On the underside, there's a thing you can use to open a can as well.
18:00This works especially well if you don't have nails or don't want them broken.
18:05Back in the day, pizza for dinner was like winning the lottery, only with more cheese.
18:11But did you ever notice that plastic stopper in the middle of the box,
18:15stopping the lid from touching the pizza?
18:17It also has another use.
18:20Use this little stopper to hold down the slice next to yours when you're getting it out of the box.
18:26Yeah, you can thank me later.
18:28That square of fabric isn't meant for repairing holes in your clothing,
18:32although might as well keep it just in case.
18:35It's actually a tester for your washing machine and detergent.
18:39If the fabric square comes out of the cycle okay, then wash away.
18:44But be honest, how many people do you think have really ever done this?
18:49I'm guessing not many.
18:52Okay, so right after being processed, plastic water bottles aren't the size you buy at the store.
18:57Even a gallon water bottle starts its life as a small tube.
19:01Later, it gets heated, inflated, and shaped into the bottle you know.
19:05Boy, I can relate to the heated and inflated part.
19:09Now, not all potato chips are actually fried potato slices.
19:13Some companies use a mix of potato flakes, cornstarch, and water to produce chips.
19:18This mix is then pressed into a dough, and chips are cut out from it with the help of shape
19:23molds.
19:23Then the chips are fried, which takes about 11 seconds.
19:27After that, all excess oil gets drained, and the chips are seasoned and packed.
19:33There's a legend that only two people in the world know the original recipe that gives Coca-Cola its signature
19:40taste.
19:40These people aren't allowed to travel together, so that the recipe never gets lost.
19:45Even though it's just a popular legend, not many people are aware of all the ingredients of the world-famous
19:51drink.
19:53One of them used to be the cola nut.
19:56Hey, I used to be a cola nut.
19:58You can find these nuts inside the fruit of the cola tree.
20:01Each fruit is about the size of a chestnut and has between two and five cola nuts inside.
20:07The cola fruit and nuts are packed with caffeine.
20:11Nowadays, Coca-Cola is said to no longer contain the cola nut extract.
20:16It's rumored to have been replaced with artificial flavoring.
20:19But since the drink's recipe is such a closely guarded secret,
20:23no one knows for sure.
20:25Hey, maybe we can ask Pepsi!
20:28These days, it's quite simple to make a mirror.
20:31Producers take a regular sheet of glass as a base.
20:34Then, they apply a reflective coating.
20:36This usually means spraying a thin layer of either silver or aluminum onto the back of the sheet of glass.
20:42This process is called silvering.
20:46Some kinds of car wax contain carnauba wax, also called Brazil wax.
20:51That's a vegetable wax people get from the fronds of the carnauba tree growing in Brazil.
20:56To get the wax, the leaves of this tree first get dried and then beaten.
21:01Ooh, ooh, ow, ow!
21:02This is how you can remove the powdery wax.
21:07Now, pencils.
21:08First, their leads are made by mixing clay and graphite powder.
21:12This mixture is then baked.
21:14After that, pencil bodies are made.
21:16If they're wooden, the material should be chosen carefully.
21:19It should be soft enough to sharpen, but tough enough not to break.
21:24When the pre-cut sections are delivered to the factory, they have grooves cut in them.
21:29These grooves will later accommodate the leads.
21:31Then, special glue is added.
21:33This way, the leads will stay in place.
21:36Next, every second section is sent to a special conveyor, and the leads are placed in the grooves.
21:41Then, another section is glued to the one filled with leads.
21:45We get a large multi-pencil sandwich.
21:48Mmm, sandwich.
21:49I'm getting hungry.
21:49The two parts of this sandwich get compressed and cut lengthwise.
21:54Then, they're shaped and form separate pencils.
21:58Lava lamps were invented in the middle of the 20th century.
22:01The magic happening inside is due to the right amount and type of ingredients.
22:06Two of them are oil and paraffin wax.
22:09The oil helps the wax heat up.
22:11And once it's heated, it starts rising up slowly.
22:15Once the blob reaches the surface, it cools down and sinks back to the bottom.
22:21Now, nutmeg is a strongly flavored spice used in many cuisines all over the globe.
22:27Despite its name, nutmeg isn't a nut.
22:30It's technically a seed native to the Spice Islands and East Indies tropical islands.
22:35Nutmeg grows on trees, and the seed itself is sealed in a shell.
22:39Once it's ripe, the outer shell cracks open.
22:43Chocolate comes from the cacao tree, which is native to the Amazon.
22:48These trees also grow in Central and South America and some other tropical climates in Africa and Asia.
22:55The seeds of the cacao tree are very bitter.
22:58They have to be fermented to develop the flavor you're used to.
23:01After this process, the beans get dried, cleaned, and roasted.
23:05The shell is removed, and crumbled bits of dried cocoa beans are ground to cocoa mass.
23:11This mass is then used in the production of all kinds of chocolatey things.
23:17In the past, people used to chew different types of aromatic substances, including beeswax, tree resin, or even aromatic twigs.
23:25But modern-day chewing gum is made of a natural latex-like ingredient called chicle.
23:31It gets extracted from trees.
23:35Modern marbles are made from glass.
23:37The first step is to melt recycled glass and previously rejected marbles that turned out to be too small or
23:43too big.
23:44About 15 hours later, the molten glass is ready for processing.
23:49A special cutter bar moves through the stream of liquid glass every half a second.
23:54It separates small pieces of glass.
23:57There are future marbles called slugs.
23:59The faster the cutter bar moves, the smaller the marbles are.
24:04After that, the still-hot slugs are sent through several constantly rotating metal rollers.
24:10They keep the slugs apart and also cool them.
24:13These ridged rollers also give the marbles their spherical shape.
24:17As for the marble's final coloring, it's determined already at the melting stage.
24:21That's when the air passes the coloring through the glass.
24:26You can find springs everywhere, from tools, electronics, and toys, to pens and mattresses.
24:32They come in different forms.
24:34For example, torsion, wire, extension, or compression springs.
24:39When a spring is made, a steel cord is passed to a derailleur.
24:43How thick this cord is depends on what kind of spring we need.
24:47The derailleur unwinds the roll and sends the cord to a computer-controlled forming machine.
24:53That's where the cord gets coiled to the needed length and cut into pieces.
24:58Now, to produce tomato ketchup, one of my favorites, you need tomato paste or puree, sugar, or some other natural
25:06sweetener.
25:07Salt, spices, vinegar, and onion powder.
25:10First, the needed volume of the tomato paste is heated while being constantly stirred.
25:15Then, other ingredients are added as well.
25:19Before the ketchup is bottled, it has to go through several cooling stages.
25:23Meanwhile, bottles are already aligned and waiting to be filled with the ketchup.
25:27This usually happens automatically.
25:29At the end of this process, caps and labels are added to the bottles.
25:35Cashew nuts are rich in plant protein, healthy fats, and fiber, and low in sugar.
25:40But they're some of the most expensive nuts out there.
25:43And no wonder!
25:44The cashew tree, native to tropical regions of Brazil, produces a long stalk called a cashew apple.
25:51It resembles a small pear.
25:53Well then, why don't they just call it a cashew pear?
25:56Anyway, at the end of this stalk, there's a kidney-shaped nut.
26:00It's protected by a double shell that contains a poisonous, oily substance.
26:05It's the main reason cashews aren't sold in their shells like peanuts or pistachios.
26:10Cashews need to be dried and roasted first.
26:12This removes the toxins and makes the shell brittle and much easier to remove.
26:19Nail polish, as we know it today, is a rather modern invention.
26:23It became popular at the beginning of the 20th century.
26:26Different companies use different kinds of chemicals and ingredients to produce nail polish.
26:31But one of these ingredients is always the same – nitrocellulose.
26:35This substance is actually liquid, but it gets mixed with plasticizers.
26:39They make nail polish more flexible and allow you to wear it longer.
26:45The process of creating ice cream sandwiches is pretty simple.
26:49First, ice cream gets whipped.
26:51It's done to add some air.
26:53The resulting substance is then sent to the next part of the assembly.
26:56Their two lines of wafers are already sandwiched together.
27:00And ice cream is simultaneously injected between them.
27:03It happens so quickly that more than a hundred ice cream sandwiches can be made in a minute.
27:08Mmm, how many can I eat in a minute?
27:12There are all kinds of plastic brooms out there.
27:15But there's one type that's made from recycled plastic bottles.
27:19With people buying one million plastic bottles all over the world, it's a cool way to reuse plastic.
27:27Tires production is a multi-step process.
27:30Tires are made from more than 15 main ingredients.
27:33Among them, there's synthetic and natural rubber, carbon black pigment, and chemical additives.
27:40Giant mixers stir these ingredients under high pressure and temperature.
27:44The final result is almost always thin rubber gum.
27:47It gets rolled into sheets.
27:49After that, tires get assembled on a special machine.
27:53Different kinds of cloth, rubber, and metal are used for the production of a tire.
27:57Finally, the tire gets cured in a special press under more than 300 degrees of heat and high pressure.
28:04This process lasts for 12 to 15 minutes.
28:08When they make darts, the flight shafts are produced first.
28:1210-foot-long aluminum rods are put into a special machine.
28:16It has a few cutting tools that work from several angles at the same time.
28:21The rod turns into shafts.
28:23There are threads cut into each flight shaft so that it can be later attached to the dart barrel.
28:28That's the part you hold and fling.
28:30On the other end, a cross saw makes slots for the aero flights.
28:35At the same time, brass rods turn into the barrels on another machine.
28:40Grooves are cut into the barrel surface.
28:42This makes them easier to hold.
28:44And finally, they produce a dart point.
28:47It's done with the help of a hydraulic press.
28:50It forces pointed steel into the hollow part of the barrel.
28:53And darts all there is about how they make darts.
28:57You know what?
28:59That little disc that's underneath bottle caps isn't just a leftover part of the production process.
29:04It creates an even tighter seal with the lid.
29:07So even if you turn the bottle upside down, the liquid doesn't leak out everywhere.
29:11The plastic disc keeps carbonated soda sparkly for longer as well.
29:15So keep it if it's going back into the fridge.
29:19Placing a wooden spoon across a pot of cooking pasta can prevent the water from boiling over.
29:24This will destabilize the bubbles when they contact the spoon, preventing a spillover onto the stovetop.
29:30To make the perfect smoothie, put the liquids in first.
29:34Then add any ingredients after you've put milk, coconut water, coffee, or yogurt.
29:39This will allow the perfect swirl to blend everything properly.
29:43When you open a peanut butter jar for the first time, it looks all creamy and delicious, okay?
29:48But the next day, you unscrew the lid and see a layer of unpleasantly looking brownish-yellow liquid on the
29:55top of your tree.
29:56Yuck!
29:57Well, that's oil making its way out.
29:59To avoid it, turn the jar over and store it like that.
30:03The next time, when you open the jar again, the contents will mix once more and you'll be able to
30:08enjoy that PB&J to the fullest.
30:11That hole inside of the pasta fork stirrer doesn't only drain water out.
30:15It's a great measuring tool for how much spaghetti to cook per person.
30:19The hole is the recommended amount for a single serving.
30:23Pressing the crosswalk button won't always make the walk signal come up.
30:27These buttons can be divided into three categories.
30:30The first needs to be pressed, the second won't work, and the third requires a push of the button to
30:36activate that walk signal after a certain time in the day.
30:39It all depends on what city you're in, the time of day, and where you are in that city.
30:44Tin foil and plastic wrap boxes have a special design on there to hold that roll in place.
30:51A cardboard tab on each end that works as a lock.
30:54Push those tabs in, and the roll will stay inside the box.
30:59Repeatedly pushing the closed door button in a U.S. elevator isn't going to make it close any sooner.
31:04In 1990, the U.S. passed a Disabilities Act for elevators, which means that elevators had to ensure that someone
31:11with a disability had time to get inside one.
31:15The only people who can bypass this are emergency workers and building maintenance people.
31:19They'll have keys or even special codes to make that button operational.
31:25You can turn on the new episode of your favorite TV show, fall into your cozy couch with a bag
31:30of chips, tear it open, and now you have to catch the chips spilling over.
31:34You've torn the bag too much.
31:36Careful not to make it worse.
31:38Grab a hole punch and make a hole right at the end of the tear.
31:41That will stop it from going further thanks to the round shape of the hole.
31:45Pouring out juice or milk with the spout at the bottom leads to a glugging effect that splashes the liquid
31:51all around.
31:52To avoid this, flip the carton around with the spout at the top.
31:56This allows better airflow to happen, allowing a more even flow.
32:00Same principle works with gas cans that have two holes with caps.
32:04They aren't there to fill different size equipments.
32:06The second hole is meant to be uncapped before you pour your gas to prevent that glugging effect.
32:12Getting one tic-tac out of that tiny container can usually end up as fine.
32:17I'm not complaining.
32:18But we've been doing it wrong the whole time.
32:21There's a hole built into the lid of the container that does more than keeping the lid closed tightly.
32:27Flip the container upside down and one tic-tac will be stuck in the lid.
32:32Changing the thermostat setting in the vast majority of office buildings won't do a thing.
32:36The system controls are kept outside the air ducts, not on the wall.
32:40Well, these dummy thermostats are to give the illusion that the AC or heat is changing.
32:46The most they'll change is 1 or 2 degrees.
32:49That's if they're connected at all.
32:51Nonstick pans make cleaning up a breeze after cooking a meal.
32:54But what makes a nonstick pan so useful is the coating.
32:58However, metal utensils on the pan will increase the chances of scratching or ruining the coating.
33:03So it's best to opt for those made of wood or plastic.
33:08How many times have you heated your food in the microwave, only to stir it on the plate and heat
33:13it again?
33:13Because it's only hot at the edges, but ice cold in the center.
33:17Well, to forget about it forever, make some room in the center of the plate,
33:22spreading the food toward the edges before putting it in the oven.
33:25The microwaves heat the food from the walls, so it's only natural that the middle takes the longest to heat
33:31up.
33:32One more microwave trick while we're at it.
33:34You can actually mute it.
33:36Look closely at the front panel for a sound button.
33:39If there's none, try pressing and holding 1 or 0, stop or cancel.
33:43It'll either result in turning off the beeping sounds or activating a lock feature.
33:48And now you're on your own.
33:49Slow cookers work by trapping the heat inside and gradually cook food over a period of time.
33:56Lifting a lid to check on its progress, like a pot lid, will allow the heat to escape,
34:00increasing the amount of cooking time considerably.
34:03So, no peeking!
34:05That little pocket on your jeans wasn't designed for loose change or keys.
34:09They were originally designed for the pocket watch in the 1890s.
34:13Around those pocket areas, there are rivets sticking out as well.
34:16They're there to help reinforce the sensitive areas of the jeans that get the most wear and tear.
34:23Pre-rinsing your dishes before putting them into the dishwasher might be all for nothing.
34:27Most modern dishwashers have sensors inside to sense how dirty your plates are.
34:32This allows them to wash the dishes with a controlled amount of water.
34:36Scrape any solid food away and stack properly, allowing the dishwasher to do the hard work.
34:42Ceiling fans aren't just for hot days.
34:44There's a little switch on top that can change the direction of the fan.
34:48The summer setting runs counterclockwise to pull the cooler air up,
34:52while the winter setting moves clockwise, pushing the warmer air down.
34:57Metallic zippers have a hidden lock built in.
35:00Next time you've put on a pair of pants, shorts, or skirt,
35:03don't leave the zipper handle in an upward position.
35:06Push the little zipper tab downwards and it'll automatically lock.
35:11Toothpicks have a built-in holder to prevent you from just leaving them on the table.
35:15Just break off the top.
35:17Place that on your table and your toothpick between the notches.
35:21Pointy end up, of course.
35:22Now, it won't touch the table and get all dirty.
35:25You can do the same with disposable chopsticks.
35:27Break off the top piece before you pull them apart.
35:31Every can of soda comes with a tab for easy opening of the tasty beverage,
35:35and every single one of them has a relatively large hole in the top.
35:39While it can make it easier to get your finger under the tab to get to your soda,
35:43its intended purpose is a straw holder.
35:46Spin the tab over the opening and place your straw through it to secure it in.
35:51Those tiny dimples on golf balls actually give a greater lift to the ball and reduce air resistance,
35:57meaning the ball can go further with them.
35:59These dimples come in spherical and hexagonal shapes,
36:03with each slightest change affecting the ball's performance.
36:06That is, if you can hit the thing with some degree of confidence and accuracy.
36:10Which, of course, doesn't include me.
36:13Some pens have caps with holes in their tops.
36:16Those are put there as a safety measure.
36:18If someone accidentally swallows a cap while chewing on it,
36:21they'll still have some space to breathe.
36:24When you order a soda to go, it usually comes with a plastic lid.
36:27This lid is useful when you're in the car or walking and want to prevent your soda from spilling.
36:33But it can also be a great coaster.
36:36Just flip the lid upside down and place it under your cup.
36:40If you prefer to buy milk in plastic containers, you've probably seen big circles on their sides.
36:46These circles absorb the shock if you drop the milk jug on the floor.
36:50They also create some extra room for the jug to expand if needed.
36:54That's how you can see if the milks turn bad without tasting it.
36:59Women's blouses mostly have their buttons on the left.
37:02But the majority of people are right-handed.
37:04So it'd definitely make more sense to put buttons on the same side.
37:08But a hundred or even more years ago, only rich women had blouses with buttons.
37:13And they had maids who dressed them.
37:16The buttons on the left were actually on the right for the maids who faced the women they were dressing.
37:20But look at the men they have to use them so.
37:21They tell.
37:21Hey there they be with those.
37:21Londivesse.