Moscow Mule 100 % Hammered Copper Unlined Mug /Cup (16-ounce/set of 4, Brass Thumb Handle) 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 finish with a tarnish resistant, food-safe lacquer coating outside of the mug to protect its natural beauty and luster for years to come. Unique style and superior quality, our unlined mugs are beautiful and externally lacquered to last a long time 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. Frequently used both at homes and at bars. Preferred by Mixologists!