Constructed of 18/8 food-grade stainless steel, durable and unbreakable. All components are non-toxic, Lead Free, BPA free and environmentally friendly. Electro polished inside, highly resistant to rust. Giving you a clean tasting drink every time! Premium Powder coating offers a steady grip without slipping from sweaty palms and will not fade or fall off.Easy to enjoy the entourage, more energetic and more casual, portable thermos cup.These bottles can also be great party favors, a gift to your friends.Customized is available.