Solid Hammered Copper Mug with Brass Thumb - Set of 4 FEEL LIKE A KING OR QUEEN WITH THIS MUG IN YOUR HAND... This eye-catching, 16 ounce, authentic Moscow Mule mug is 100% solid copper throughout, not stainless steel or nickel. Our Moscow Mule copper cups feature a beautifully hammered finish with a tarnish resistant, food-safe lacquer coating outside of the mug to protect its natural beauty and luster for years to come. MULTIPLE USES - This Pure Solid Copper Drinking Mug Keeps All Your Favorite Drinks Cold and Refreshing; Used for Moscow Mules, Beer Mugs, Copper Infused Water, Iced Coffee, Iced Tea, or any Whiskey, Vodka, Rum, and Tequila Mixed Drinks; Freezeable; Leave in the Freezer for a Frosted Mug Effect and Keep Your Drink Colder Much Longer; This Mug is Heat Sensitive; Let Hot Drinks such as Coffee or Tea Cool Prior to Use as Handle and Mug Will be Hot AUTHENTIC MOSCOW MULES - This Mug is NOT an Imitation Copper Plated Mug, nor is it Lined with Tin, Nickel, Steel, or Food Lacquer Inner Coatings; This Ensures the Appropriate Citric Acid to Copper Reaction for which Moscow Mules are Known; Because of This, the Mug WILL Tarnish; This is Normal for an Authentic Copper Moscow Mule Mug. Unique style and superior quality, our unlined mugs are beautiful and externally lacquered to last a long time Frequently used both at homes and at bars. Preferred by Mixologists!