A Moscow Mule Mug is a traditional drinking vessel typically made of copper. It is designed to hold the popular cocktail known as the Moscow Mule, which consists of vodka, ginger beer, and lime juice. The mug's metal construction helps keep the drink cold and enhances the overall experience. These mugs often feature a distinctive handle and a polished exterior, making them visually appealing. While copper is the most common material, some variations may use stainless steel or other metals. The Moscow Mule Mug has become a popular choice for serving various cocktails and is often associated with a vintage aesthetic.