Sertodo Copper CMM-18 Moscow Mule Mug, Hand Hammered 100% Pure Copper, 18 oz, Single 100% PURE COPPER - inherently clean material with strong antimicrobial, antibacterial and antifungal properties CAPACITY - 18 fluid ounces SUPERIOR QUALITY - our hammer polish beats shine, beauty and durability that lasts for generations TIG WELDED HANDLES - will never fall off or loosen NO LACQUER - or coating on our copper will wear off unevenly or into your food/drink