Copper Moscow Mule Mug with Logo 18oz Set of 4 Cold Beverage-Beer Mug The 100% real solid copper mug enhances the flavor and keeps the drink colder, longer Each mug is dishwasher safe with a hygienic seamless interior. Each mug has a sturdy 2 inch handle which is comfortable and easy to hold. Holds 18 oz For Cold Drinks Only.