The ingredients of a Moscow Mule make for a simple but refreshing cocktail that combines vodka, ginger beer, lime and crushed ice. And a signature move? Serving the drink in a copper vessel. It is said to bring out the flavors of the ginger beer and aroma of the vodka, not to mention keep your drink ice-cold for longer. Said to have been hatched in an L.A. bar in 1941 by three down-on-their-luck entrepreneurs, today there are many more variations of the creators’ stunning cocktail, including the Kentucky Mule (bourbon instead of vodka) and Mexican Mule (tequila-based). Whatever you’re pouring, below are a few of our favorite Mule mugs. And we have to admit: no matter what you’re sipping, it’s better in copper.