Water tumbler is made of gauge 18/8 stainless steel with an extra spray painting, good rust resistance, durable and convenient to use, easy to clean.Classic tumblers are double walled and vacuum insulated, by the pool, at the office, in your car, wherever - tumbler keeps your favorite drinks icy cold or piping hot for hours, also combined with a splash resistant lid and you get additional thermal control.The car tumbler can be applied as wine cups, champagne cups, or water cup, suitable for parties, picnics, boats, beach, pool, camping and hiking, etc.Customized is available.