Stainless Steel Thermo Travel Tumbler - Double Wall - 18oz. Capacity - Brushed Stainless With a Simple 1/4 Twist the Swivel Lid Unseals Ready to Unleash your Beverage. Stainless Steel Exterior, Plastic Inner Liner, Double Wall body, with Foam Insulation Inbetween. Enjoy 4 hrs. Cool / 2 hrs. Warm. Press on Swivel Lid & Silicone Gasket Seal. BPA Free Dimensions: 2.75" base diameter, 9" height (with lid) Hand wash only. (dishwasher temperatures & abrasiveness vary) Not for microwave or freeezer use.