Get this portable stainless steel thermos flask to keep hot things hot and cold things cold with this heavy-duty vacuum thermos. Unbreakable stainless steel thermos maintains temperature for several hours. Great for work, school, travel, camping, sports, and moreThermos vacuum insulation technology virtually eliminates temperature change within the beverage container by creating an airless space between two stainless steel walls. The result is an insulation layer that performs better than any other. A superior insulated container you can depend on to keep your beverages hotter, colder, fresher, longer. This bottle is perfect for all-day beverage enjoyment as it keeps beverages hot for 18 hours or cold for 24.