A mojito is traditionally served in a tall, curved glass called Collins glass. This type of glass has straight sides and holds approximately 10-12 ounces (around 300 ml) of liquid.  The long shape helps to show off the colorful layers of the cocktail, making it a perfect choice for presentations.  Many people also opt for a highball glass - a short, wide tumbler with similar capacity - when serving mojitos. Either way, enough space must be left at the top for adding ice and garnishes.