Skull Ice Cube Mold
Not just an ice skull, but an ice skull with geometric lines and bends that make it look like some sort of diamond or crystal Indiana Jones-style ice skull. Astonishing what they can do with plastic molds these days. Just close and fill the ominous 3D cranial frame with water, freeze for however long it takes to freeze things measuring 3" x 3", and voila. Out pops the baddest, scariest, yet chillest ice cube your generous pour of whiskey has ever seen.