A Manhattan is a cocktail mae with whiskey, sweet vermouth, ice, and bitters. Commonly used whiskeys include rye (the traditional choice), Canadian, bourbon and Tennessee. Proportions of whiskey to vermouth vary, from a very sweet 1:1 ratio to a much less sweet 4:1 ratio. The cocktail is often stirred with ice and strained into a cocktail glass, where it is garnished with a Maraschino cherry with a stem. A Manhattan is also frequently served on the rocks in an old-fashioned glass (lowball glass).