Dilute 5 quarts (5 liters) apple juice by adding 2 quarts (2 liters) water to it in a large pan or bowl. Add more water if apple juice is very sweet or strong tasting. Set aside 1 quart (1 liter) and...

Dilute 5 quarts (5 liters) apple juice by adding 2 quarts (2 liters) water to it in a large pan or bowl. Add more water if apple juice is very sweet or strong tasting. Set aside 1 quart (1 liter) and label sample “diluted apple juice.”

Set samples aside at room temperature for about 30 minutes, to allow powders to dissolve completely. Caffeine, in particular, needs time to dissolve.