Solid Copper Hammered Moscow Mule Mugs, 16 Oz., Set of 2. What better way to serve the timeless Moscow Mule, or Dark and Stormy than in a 100% Copper Moscow mule mug? The Moscow Mule is a classic cocktail usually served in a copper mug that has been refreshing taste buds since the 1940s. That famous blend of vodka, ginger beer, and lime juice can be enjoyed, with this new hammered solid copper Moscow mule mug. Featuring an attractive hammered finish to please the eye.