Sport/School Water bottle can keep hot for 12 hours and keep cold for 18 hours, allowing you to enjoy your favorite flavor in the long run. Made for outdoors lovers, our water bottle is the best choice!Premium Material Constructed of 304 stainless steel makes you feel at ease, durable and unbreakable. All components are non-toxic, Lead Free, BPA free and environmentally friendly. Electro polished inside, highly resistant to rust.