Kid Basix The Safe Sippy-BlueNew Leak-Proof Design! The Safe Sippy is made from clean, inert and non-leaching medical grade stainless steel.The combination of stainless steel along with the protective sleeve creates the most durable cup available to concerned parents. The Safe Sippy also features a great rubbery sleeve to provide a comfortable grip for baby and help prevent dents.Plastic on the cup is certified to be free of Bisphenol A, phthalates and DEHA. Made from stainless steel to prevent the growth of bacteria.