How to pick the perfect copper mug. Every customer that want to upgrade his cocktail list with the Moscow mule cocktail will need to use a proper copper mug to get the original taste of the Moscow mule. We created a 4 steps process for you how to choose the perfect copper mug. Step 1 (copper content) - use only 100% pure copper mugs. Copper is expensive metal so make sure you get complete value for your money. Step 2 (thickness) - pick mugs with at list 18 Gauge thickness. The thickness of the copper is very important if you will order yourself a mug with thin walled it will be damaged very easily. Step 3 (handle joints) - don\'t use a mug with rivets joints that leak and can hide bacteria. Our mugs we use new welding technology this is the only way to go. Step 4 (style) - Hammered moscow mule mugs distinctive style and durably superior in quality. Our polished copper mugs are handcrafted in India by artisans who carry on the ancient traditions of metal crafting. Each spun and hammered by hand of solid copper, with welded handles. Their design is a classic for serving iced cocktails such as the Moscow mule. The metal helps keep cocktail and other refreshments well chilled.