This sports bottle is made of double walled and vacuum insulated, which keeps your favorite beverage hot at least for 8 hours or cold for 18 hours.Double walled design stainless steel vacuum insulation and powder coated bottle body make sure it never sweat and 100% nontoxic and safe, durable finishing make the paint won't shedding, can use it for years. Wide mouth design could make it easy to put in ice cubes, fruit, protein, and more. And convenient to take it for out hiking , traveling , camping , picnicking , gyming