Double Wall Stainless Steel Thermal Travel Bottle, Vacuum Insulated, Copper Lined, 34oz. Capacity - Neon Blue 34oz. Double Wall 18/8 Stainless Steel Copper Vacuum Insulated Thermal Bottle. Enjoy 16 hrs. Cool / 8 hrs. Warm. Glossy Bright Finish exterior body, with Brushed Stainless Accent Lid and Base. Threaded & Insulated Lid. BPA Free Elegant, yet 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. Mouth Opening large enough for ice cube insertion and easy cleaning, while narrow enough for sipping. Dimensions: 3.5" base diameter, 1.3" mouth opening, 12.5" 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.