Made Of TPC. Screw On, Spill-Resistant Lid . Wide Mouth Opening  . Designed To Reduce Single-Use Plastics . Lightweight . Compact And Portable Storage Technology Enables You To Fold Bottle Into Itself. Ultimate Space-Saving Hydration Solution. Collapses To Less Than Half Its Size For Easy Storage. Features Strap That Doubles As An Easy Carry Handle When Bottle Is Expanded And A Strap To Keep Bottle Compact When Collapsed . Perfect For Travel, Hiking Or Commuting. Meets FDA Requirements . BPA Free. Hand Wash Recommended. US Design Patent No. D1,011,197 S.