A vodka martini, also known as a vodkatini or kangaroo cocktail, is a cocktail made with vodka and vermouth, a variation of a martini. A vodka martini is made by combining vodka, dry vermouth and ice in a cocktail shaker or mixing glass. The ingredients are chilled, either by stirring or shaking, then strained and served "straight up" (without ice) in a chilled cocktail glass. The drink may be garnished with an olive, a "twist" (a strip of lemon peel squeezed or twisted), capers, or cocktail onions (with the onion garnish specifically yielding a vodka Gibson). The vodka martini has become a common and popular cocktail. Some purists maintain that, while it is a perfectly fine drink, it is not a true martini, which is traditionally made with gin.