Moscow Mule Copper Mug, 100% Pure Without Lining, Unique Quality Design &ndash; Copper Sourced From the USA, FDA and California Proposition 65 Approved, 16 oz. REAL AUTHENTIC COPPER MUG. Our Mugs are 100% Pure Copper, There are Absolutely No Added Materials. This is the Same Copper that Brings Drinking Water into Your Home. There is No Engraving on the Mug COPPER FROM THE USA. All of Our Copper is Sourced from the United States, So You Can Be Sure it is the Highest Quality on the Market. HIGHEST QUALITY. There is No Lining, Making the Quality of Your Drink Better and Healthier. We are FDA and California Proposition 65 approved. CARE INSTRUCTIONS. Wash Mug by Hand With Warm Water and Soap; Do Not Put in Dishwasher. To Remove Stains Use Copper Polish or Follow Instructions on the Box. GREAT FOR MANY DRINKS. Use Your Mug for a Moscow Mule or Any Vodka Based Drink. Copper Maintains the Temperature of Its Contents, Making it Great for Many Drinks.