Moscow Mule Copper Mug 16 Once Four Pack - Set of 4 Copper Moscow mule mug with stainless steel lining Includes 4 mugs, 16-Ounce Capacity. Food safe seamless hygienic interior. Please note: these are hand wash only Stainless lining and exterior lacquer coating over copper for protection and durability Ships from the United States not China, ships within one business day Includes our Solly's Health Shop Lifetime Guarantee from manufacturing defects. We stand behind our Moscow Mule Mugs.