There"s not a hydration bottle out there that"s cleaner, greener, and more flexable than a Platypus SoftBottle. Each one comes with out Clean-Taste Guarantee, and is made with zero BPA. Your SoftBottle is green, too, because it"s ultra-reusable and lightweight, it uses less energy and materials. Finally, your SoftBottle defines flexable. It fits in a drink holder, a round pocket, a flat pocket, or any hand. When empty, it rolls up and fits any where you want it to fit. Plus, it weighs 80% less than hard hydration bottles. The Platypus SoftBottle - less energy from the world, clean hydration when you need it. Available with Closure Cap or our new dual-valve HyperFlow cap. The HyperFlow cap is easy to drink from and has bite valve that delivers a superfast flow rate. It also has a twist-lock travel valve that shuts down the system during transport, which means it won"t leak, even under pressure, making it fast and efficient hydration.