AVS STORE Moscow Mule Copper Mugs, Best for Mules, Beer and Other Ice Cold Drinks, 100% Pure Copper Mug, 16 Oz Hammered Moscow Mule mugs are made from 100% heavy gauge solid copper, 16 ounce, unlined (no nickel or tin) and are coated with a food safe lacquer to help preserve beauty. Set of 4, Made in Pure Copper Each mug is individually handmade and expertly crafted Food Safe Lacquer to resist tarnishing Not for use in microwave or dishwasher