Moscow Mule Mug, 16-ounce, Solid Pure 100 % Copper- Set of 4 HANDCRAFTED SOLID PURE COPPER construction with beautiful finish. Unique style and superior quality, our unlined mugs are beautiful and externally lacquered to last a long time IT'S MOSCOW MULE TIME with the Highest Quality 16 oz Moscow Mule Copper Mugs on Amazon. 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 GIFT IDEA - These Cool, Hand Crafted Copper Drinking Cups Make Excellent Gifts for Both Men and Women; Great for Weddings, Anniversary Gifts for Mom and Dad or Husband/Wife, or Simply as a Fun Novelty Addition to Your Current Bar Collection.