There's not a hard bottle out there that's cleaner, greener, and more flexible than a Platypus SoftBottle. Each one comes with their Clean Taste Guarantee and it's made with zero BPA. The SoftBottle is green, too, because it's ultra reusable and lightweight, it uses less energy and materials. Finally, your SoftBottle defines flexible. It fits in a drink holder, a round pocket, a flat pocket, or any hand. When empty, it rolls up and fits anywhere you want it to fit. Plus, it weighs 80% less than hard hydration bottles.