MULTIPLE USES This Pure 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.UNIQUE GIFT IDEA These Cool, Hand Crafted Copper Drinking Mugs 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.HANDCRAFTED copper shots are unique and unmatched. Each Cop29 shot glass is different in its way and is made with no automation involved by traditional Indian artisans.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.