Exclusive, unique, reusable BPA-Free tennis ball shaped water bottle made of light-weight easy-to-fold, bendable plastic! Bottle can be collapsed and easily stored away when empty and stands when full. Freezer friendly. Designed for use with cool liquids only. Not microwave or dishwasher safe - hand wash only. United States Design Patent No.: US D699,796 S. WARNING: CHOKING HAZARD--small parts. Not intended for children under 3.