Set of 4 16 Oz Solid Copper Barrel Mule Mug W-BThis beautiful barrel design mug is constructed of solid copper with nickel lining and solid brass accents, the made to last mug features a coating of resilient lacquer that resists tarnishing for lasting beauty and luster. The mug of choice when serving Manhattan's infamous Moscow Mule a cocktail made from a blend of vodka, ginger, beer, and lime juice.