Silica Gel Canisters can save your medicine from suffering in quality which can lead to ineffectiveness. Most medicine cabinets are in bathrooms where humidity forms, therefore leading to potentially spoiling important pills. Moisture and dampness can affect the physical and chemical properties of the medication; if you must store your medication in a medicine cabinet, be sure to add a silica gel capsule to your pill bottles to help prevent spoiling. These small cylinders contain silica gel beads that adsorb forty percent of its weight in water vapor and are also great for dry foods, spices, electronics, and more. The protective environment of dry air prevents all forms of moisture. Meets FDA specifications for use in dry food packaging. Includes 20 packs of Silica Gel Canisters. Dimensions: 3/4” x 9/16” x 9/16”. Coverage area: 130 cubic units per inch (1 gram)