Copper mugs helps to make your Moscow Mule and other beverage feel super chilling in hot summer. The cold metal is highly effective at insulating the cold temperature of any liquid, especially good for summertime drinking, and deflecting heat from the sun. Copper has a very high thermal conductivity so the coldness from your Mule will fly into your hands, lips and throat at an amazing rate. It will feel exactly as the icy drink. This is not possible to get that from a high ball glass. And copper mugs have become an essential ingredient for Moscow Mule. 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. Quality Product From ORNATE INTERNATIONAL