What are Stasher bags made of?

Stasher bags are made of silicone - silicone is made from sand (silica) and carbon, natural resources that give Stasher bags the purity of glass and functionality of plastic. Better yet, Stasher products are made of 100% pure platinum grade silicone — a standard even higher than food grade silicone, passing all U.S. safety requirements and even tougher European standards