Fill a small container with your favorite moisturizer, about 3/4 of the way full. Add 2.5 mL (or 1/2 tsp) of caffeine extract powder to the jar. Add 2-3 drops of jojoba (or a similar one) oil to help thin the mixture. Stir it all up using a toothpick. Apply it under your eyes gently. Wash it off.
