The Kolkata Mule is a refreshing cocktail that combines the flavors of vodka, ginger beer, lime juice, and a hint of mint. It is a twist on the classic Moscow Mule, with the addition of a local touch. The cocktail is served in a copper mug, which helps to keep the drink cold and enhances the flavors. The Kolkata Mule is a perfect choice for those looking for a refreshing and tangy cocktail to beat the heat in Kolkata.