WaterVault Insulated Water Bottle - Stainless Steel Vacuum Thermos Bottles - Cold 24 Hours, Hot 12 Hours - Double Wall Copper Plated COLD FOR 24 to 36 HOURS, HOT FOR 12 HOURS - 18/8 stainless steel inner and outer wall, copper thermo technology to prevent heat from entering or leaving the thermos bottle by thermal radiation; Even the threaded lid is insulated, that means theres no escape for heat when you have a hot beverage and no way for heat to get in if you want to keep it cold FOUR SIZES, MULTIPLE COLORS - WaterVault Cola Shaped Water Bottles; ergonomically designed for style and comfort; One of the Original cola shaped stainless steel water bottles and the first with copper plated technology; don't be fooled by cheap Chineese imitations OUTDOOR TOUGH - WaterVault insulated canteen bottles keep up with your life no matter how tough, how active, or how busy you are; They are leak-proof, rust-proof. reusable, sustainable and environmentally friendly GIVE A GIFT- As an added bonus, Free gift box included; Whether youre giving this to yourself as a gift or sharing your find with someone else, WaterVault thermal flasks sports bottles comes in an elegant gift box, our gift to you; gift boxes may not be available in bundled sets SATISFACTION GUARANTEED - WaterVault stands behind its thermos water bottles with an unconditional 60-day guarantee and a 1-year limited warranty against manufacturer defects, offered exclusively by The Quantum Group. Remember to treat your water bottle with care - hand washing only and do not submerge or use cleansers containing chlorine; Not suitable for freezing, microwaving, or cooking