The cosmopolitan, also known as the 'cosmo,' is a popular vodka-based cocktail that gained fame in the 1990s. It's a vibrant and fruity drink that combines vodka, cranberry juice, triple sec, and lime juice. Shake all the ingredients with ice in a cocktail shaker and strain into a martini glass. Garnish with a lime wheel or twist. Enjoy the cosmopolitan's sweet and tangy flavors with a touch of elegance.