Klean Kanteen Kid Kanteen Classic Double Wall Vacuum Insulated Stainless Steel Kids Water Bottle with Leak Proof Loop Cap Double Wall Vacuum Insulation, Keeps Hot up to 12 Hours, Keeps Iced up to 40 Hours Food Grade 18/8 Stainless Steel Construction Comes with Leakproof BPA-free Polypropylene #5 cap Large 1.75 inch (44 millimeter) opening fits ice, easy to fill and pour; Compatible with all Klean Kanteen Classic caps Backed by the Klean Kanteen Strong as Steel Guarantee