The vacuum water bottle is made of 304 food grade stainless steel. Vacuum insulation design keeps the temperature of the beverage for hours.The vacuum bottles have great thermal insulation effect to keep your hot coffe tea or chilled wine cocktail cola in good condition for more than 8 hours.Suitable for office, home, school, sports, travel, outdoor, the best gym, workout, bike, football, running, camping, hiking, coccer, cycling, yoga, swiming bottles.Other capacities on request.Customized is available.