British Style Black - Leopold Style The jigger is a biconical measuring instrument or small hourglass. The British Style jigger, Leopold model, is characterized by multiple internal dosing lines that allow it to be used to measure different amounts of liquid. It is easy to handle and turn with two fingers thanks to the central throat. The inside is in steel color, while the outside is in gold color. The dosage lines correspond to the following quantities: 0.3 - 0.6 - 1 - 2 oz In Italy it is used in Mixology & Vintage.