Thermal Sport Travel Bottle, Double Wall Stainless Steel ,Copper Lined Vacuum Insulated, 20oz. Capacity - Gray 20oz. Double Wall 18/8 Stainless Steel Copper Vacuum Insulated Thermal Bottle. Enjoy 16 hrs. Cool / 8 hrs. Warm. Matte Black Finish exterior body, Brushed Stainless Inner Liner,with Copper Coating In-between. Nylon Carry Strap with Detachable Buckle, Removable Silicone Base Grip. BPA Free Durable design incorporating excellent fit and finish from high quality grade materials. Copper plated inner wall prevents heat from entering or exiting the bottle by thermal radiation. Bottle Mouth Opening large enough for easy pouring & cleaning, while narrow enough for sipping. Dimensions: 2.75" base diameter, 1.1" mouth opening, 9.5" height (with lid) Hand Wash Recommended, due to Individual Dishwasher Temperature and Abrasiveness Variations that may cause damage to the exterior finish of the bottle.