Klean Kanteen Wide Double Wall Vacuum Insulated Stainless Steel Coffee Mug with Leak Proof Caf&eacute; Cap 2.0 Double Wall Vacuum Insulation, Keeps Hot up to 10 Hours, Keeps Iced up to 30 Hours Food Grade 18/8 Stainless Steel, BPA-free Polypropylene #5, Food Grade Silicone Construction Comes with Leak Proof Caf Cap 2.0 with Easy Clean Construction Large 2.125 inch (54 millimeter) opening fits ice, easy to fill and pour; Compatible with all Klean Kanteen Wide caps Backed by the Klean Kanteen Strong as Steel Guarantee