What better way to serve the timeless Moscow Mule than in an Old Dutch Moscow Mule Mug. The Moscow Mule is a classic cocktail usually served in a copper mug that has been refreshing taste buds since the 1940's. With a hammered copper exterior layer bonded to an 18/8 stainless steel interior, they're stylish and durable. There's no cheap copper-plating involved. This mug is double-walled with a full layer of copper and a full layer of stainless steel to make a superior Moscow Mule Mug.