On the go? Running to a meeting or running to stay in shape our new Hydra bottles will go where you go. Keeping your cold water cold and hot coffee hot for hours. Double walled, copper clad vacuum seal for optimum ice and heat retention. Coated to make the Hydra just that much tougher. Clad vacuum seal for optimum ice and head retention. Top shelf dishwasher safe, no need to spend time hand washing, let your dishwasher do the work for you. Holds Ice for up to 24 hours and holds heat for up to 6 hours.