Make sure your party guests are sufficiently spooked with these Skull Ice Molds. Each mold in this set-of-two makes an incredibly detailed, ghoulish skull to cool down your favorite cocktails and beverages. Recreating the look of skeleton skulls in a glass, this single ice cube will melt slowly, ensuring every drop of your drink is cool without over-dilution. The easy-to-use molds feature a stable plastic base and a leak-free silicone lid. Simply fill the plastic base to the fill line, then gently insert the silicone lid to create a seal. A hole in the top of the lid allows air to escape as the water freezes, creating seamless rocks. The stackable molds save space in the freezer, and the stable base and leak-proof lid will keep the water inside the mold. Made of BPA-free plastic and silicone. Dishwasher safe.