STREET CRAFT Set of 4 Copper Tankard Large Moscow Mule Mug Copper Mugs Capacity 20 Ounce 100% pure and solid coppertankard moscow mule mugs,brass handle -20 oz For moscow mule drink, mix vodka, ginger beer, ice and lemon for an amazing drink experience Copper keeps drinks ice cold and for longer period than glass mugs Can be used for mojito, apple martini, cosmo, margarita and all cold beverage Do not microwave, wash by hand only .