Chill your drinks, not your hands. The double-wall vacuum insulated design guards against diluting heat transfer to make super-chilled drinks while protecting your hand from painful frostbite. The cocktail shaker has a super high-capacity jigger top that allows you to dial your mix from micro ¼ and ½ oz dashes up to a full 6-ounce concoction. It has a twist-lock lid and top, so no more sticky leaks. The cocktail shaker is entirely made of Pro-Grade 18/8 stainless steel and is dishwasher safe.