This awesome measuring jigger is adjustable and ensures no more eyeballing double shots and no more guessing where half of an ounce is. The Rabbit jigger effortlessly helps you create perfect cocktails. Simply push up or down to adjust the volume anywhere between 0.5 and 2.0 ounces. The jigger features a convenient window to see exactly how much you have poured. The adjustable jigger from Metrokane is made from durable stainless steel with sturdy plastic and was built to last.