Vacuum Insulated: This double-walled cocktail shaker will not get freezing cold to the touch, sweat, or cause your beverage to get watered down. Leak Proof Shaker Lid: The lid has a built in strainer, twist off the top lid to pour your drink; The top lid doubles as a jigger, it has 1/2 & 1 ounce measurement marks; The shaker lid twists on the cup and is compatible all with Classic tumblers
