These revolutionary bottles are made with double wall, vacuum insulated technology that maintains the temperature of your drink! Cold drinks stay icy cold up to 24 hours, hot stays steaming hot up to 6 hours. This technology also guarantees no condensation or heat transfer to the outside of your bottle, ever. Each bottle is made with pro grade stainless steel, which protects against flavor transfer so your morning coffee won't taste like last night's margarita ;) To complete the innovation, a colorful powder coat adds slip-free grip and extra durability. We're confident that these bottles will become a staple in your lifestyle!