The Cosmopolitan is a classic cocktail known for its elegant and sophisticated taste. While traditionally made with vodka, this variation swaps vodka for light rum, offering a unique twist to the classic recipe. The light rum brings a subtle sweetness and adds a tropical note to the drink. The cranberry juice provides a vibrant red color and a tangy flavor, while the fresh lime juice adds a refreshing citrusy touch. The triple sec or orange liqueur contributes a hint of sweetness and citrus essence. Shake the ingredients together to ensure they are well-mixed and chilled. The garnish of a lime twist or cranberries adds a pop of color and enhances the visual appeal. Sip on a Cosmopolitan rum cocktail and enjoy its sophisticated and balanced flavors.