The double walled stainless steel straw bottle adopts the vacuum insulation technology of the thermos bottle,which can keep the items in the bottle cold and fresh for up to 12 hours,and the vacuum insulation can keep the beverage cold for a longer time.The exterior is made of stainless steel,durable enough to withstand the demands of everyday use. This sport bottle is designed with a big and hand friendly handle, thickened handle is not easy to break. Extra-large handles fit all sizes of hand.