Vapur Anti-Bottles are BPA-free, BPS-free and Pthalate Free, and are constructed of three layers of ultra-durable plastic. The innermost layer is made from FDA-approved polyethylene, which is then bonded to two layers of nylon for strength and durability. Every Anti-Bottle is designed to withstand everyday use and regular cleaning. The inner layer is odor and taste resistant, so it can safely be reused again and again!