Our high quality BPA Free, 304 stainless steel bottle is vacuum insulated with an interior copper coating that supports retention of temperature, thus the temperature of the beverage inside will remain the same for a long period of time due to there being no transferring of energy to outer wall. The bottle won’t feel hot, cold or moist on the outside due to its unique double wall construction. Our bottles are durable, reusable, ultralight, environmental friendly, they have a unique design and they are powder coated. They are an all-round stylish product suitable for everyday use.