Einfach Retro Style BPA-Free All Stainless Steel Double Wall Vacuum Insulated Water Bottle Keeps cold for 24+ hours, keeps hot for 15+ hours: Double wall, vacuum insulated water bottle using 18/8 (304) stainless steel metal means cold and hot beverages stay that way for a long time No plastic no glass: 100% BPA Free, Tonix Free, 18/8 stainless steel design is safe and durable, so you never need to worry about the bottle rusting, breaking or leaving a metallic taste - One time investment only Easy Carry, Leak proof, no spill, no sweat: all-stainless steel lid comes with a handle ring attached, and slides easily into most car cup holders, bike racks or hiking backpacks Retro Design: A-Z alphabet brushed in grey color, vintage and simple Tips: please fill the bottle with boiling water overnight when using in first time, then the smell will gone