Our 40oz. Tumblers are stainless steel, double-walled, and vacuum insulated. Keep your drinks ice cold longer, and your warm drinks hotter, no matter the outside temperature. The included all-new shaded Splash Proof lid lets you know exactly how much drink you have left and when it is time for a refill. The flip-top closure resists spills and is straw friendly. Easy to clean, the stainless steel is also highly durable and resistant to drops and scratches.