Clean, green and flexible, the Platy Soft Bottle .5L w/HyperFlow Cap is ultra-reusable and lightweight it's also made with zero BPA. The Soft Bottle fits pretty A lot anywhere from a drink holder in your car, a backpack pocket or easily in your hand. When empty it rolls flat for easy lightweight storage, ideal for saving weight on backcountry trips. Also available in a 1 liter size.