Tankard Large Moscow Mule Copper Mugs, 20 Oz - Handmade of 100% Pure Copper, Brass Handle set of 4

structions : After each use, clean with warm water and soft soap. No hard chemicals or detergents. Dry the copper mug with soft cloth. Do not leave your drink in mug overnight to avoid stains Not dishwasher safe Do not use in microwave Do not use with hot beverages Copper Beer Stein is the mug of choice when drinking beer or serving the infamous Moscow Mule. The copper mug enhances the flavor and keeps the drink colder, longer. Great for other drinks too! Although there is debate about the beginnings of the Moscow Mule, there is no debate about its lasting legacy. Some say the inventors had a stroke of genius, while others claim it was simply created in an effort to go through a plentiful stash of both vodka and ginger beer Whether it was a marketing effort or a stroke of luck, we're convinced it was the mug that made the mule