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What's included? 50 pack of 5 gram silica packets, one 50g packet of activated clay, and one cobalt-free humidity indicator card. Are these toxic to humans, particularly babies, or pets? Silica gels are 100% SAFE, NON-TOXIC, and recognized as "GRAS" (Generally Regarded As Safe) by the FDA. How long do they last? Desiccants last indefinitely when stored in a cool & dry place. Once saturated, they can be disposed of or reactivated. What is reactivation? Reactivation is the process of heating the silica gel beads in the oven on a cookie sheet at 220 degrees Fahrenheit for 2-3 hours. What is activated clay and how do I use it? Activated clay is another desiccant used mainly in the freight and logistics industry and are used in the same way as silica gel.