The Cosmopolitan, also known as the 'Cosmo,' is a popular vodka-based cocktail that gained popularity in the 1990s. It is made with vodka, cranberry juice, lime juice, and triple sec. The Cosmopolitan is known for its vibrant pink color and its sweet and tart flavor profile. This cocktail is often associated with sophistication and is a favorite among many cocktail enthusiasts. Whether you're sipping it at a fancy cocktail bar or enjoying it at home, the Cosmopolitan is a classic choice for any occasion.