Double walled 18/8 stainless steel vacuum insulated heavy duty construction. This can cooler is as great as it gets to keeping your can or bottle of beer or soda ice cold. Unscrew the lid, stick your can or bottle in, and rescrew the lid on for a tight gasket seal. Fits most bottles and cans. Easy to clean and sweat free no-coaster technology. Not microwave or dishwasher safe. Hand wash only