The insulated beverage cooler is laser Engraved on one side, the paint is removed to show the stainless steel underneath Not recommended for dishwashers, hand wash only. Designed with a Double-walled vacuum insulation with a rubber top. Easily unscrew the rubber top - slide in a slim beverage can into the can cooler and screw back on the black top. Designed to keep beverages colder for longer. Holds 12 or 16 oz aluminum beer cans and glass beer bottles.