NSULATED SPORTS WATER BOTTLE: Goodbye sweat! The narrow mouth double wall insulation makes the Iron Flask sweat-free! It keeps your drink COLD for up to 24 hours, and HOT for up to 12 hours. 18/8 PREMIUM STAINLESS STEEL: The Iron Flask is made of 18/8 Stainless steel that is BPA free and non-toxic. It will never leave a metal taste or rust. HAND WASH ONLY WITH SOAPY HOT WATER. TRIO OF LIDS: The Iron Flask is equipped with three uniquely designed, leakproof lids: our patented Spout Lid for precision pouring, a handy Flip Lid, and a practical Handle Lid. UNMATCHED DURABILITY & FUNCTIONALITY: Crafted with double-walled stainless steel, our bottle guarantees optimal temperature retention, be it hot or cold beverages. Paired with its narrow mouth spout for controlled sipping and its variety of leakproof lids – the patented Spout, Flip, and Handle options – you get a fusion of style, strength, and utility. Perfect for your active lifestyle!