A jigger or measure is a bartending tool used to measure liquor, which is typically then poured into a cocktail shaker. It is named for the unit of liquid it typically measures, 1.5 fluid ounce (~44 ml) jigger or shot. A traditional style of jigger is made of stainless steel with two unequal sized opposing cones in an hourglass shape on the end of a rod. Typically, one cone measures a regulation single shot, and the other some fraction or multiple - with the actual sizes depending on local laws and customs.