Hot Cold Double Wall 18/8 Stainless Steel Thermal Travel Bottle, Vacuum Insulated, 16oz. Capacity - High Polish Stainless 18/8 Stainless Steel inside and out, Vacuum Insulated Double Wall body. Enjoy 12 hrs. Cool / 6 hrs. Warm. With a Simple Twist the 360 Degree Lid Securely Seals and Is able to Drink or Pour from in Any Direction. Screw on Threaded Lid & Silicone Gasket Seal. BPA Free Dimensions: 2.75" base diameter, 2.5" mouth opening, 8.5" height (with lid) Hand Wash Recommended, due to Dishwasher Temperature and Abrasiveness Variations.