bintiva Sports Water Bottle - Vacuum Insulated, Eco Friendly 18/8 Stainless Steel - Double Wall, Sweat and Toxin Free Crafted from food grade 18/8 (type 304) stainless steel on both the inside and the outside of the bottle. Double wall vacuum seal technology keeps liquids hot for 12 hours, and cold for 24 hours. It also prevents any condensation from forming on the outside of the bottle. The recycable, eco friendly bottle is BPA, phthalate, and toxin free, for ultimate user safety. The unique materials and design provide the most durable and lightweight water bottle. The specially designed vacuum seal prevents any leaks. Like all Bintiva products, the water bottle comes with a 100% manufacturer's warranty.