The CamelBak Better Bottle is made from a new copolyester polymer called Tritan, made by Eastman. It offers the same great qualities that you have come to expect from polycarbonate bottles and is 100% BPA-free. The caps are made from polypropylene -- for toughness and sealing performance. The Big Bite Valve is made from medical-grade silicone -- for long life and taste-free performance.
