Traditionally, a cosmopolitan cocktail is served in a stemmed cocktail glass, also known as a martini glass. This type of glass is typically triangular in shape, with a wide rim and a narrow stem that attaches to a round or cone-shaped bowl. The wide rim allows for garnishes such as a citrus twist or sugar rim, while the shape of the bowl is designed to enhance the aroma and flavor of the drink. The stem allows for the drink to be held without warming it with the hand.