Copper Moscow Mule Mug Set of Two, 16-ounce Premium Copper Moscow mule mug with stainless steel lining Includes 2 Moscow Mule mugs, 16-Ounce Capacity Stainless lining and exterior lacquer coating over copper for protection and durability. These are handwash only, do not wash them in the dishwasher Food safe seamless hygienic interior Includes our Lifetime Guarantee from manufacturing defects. We stand behind our Moscow Mule Mugs.