Made from solid copper, Meltdown makes exquisite ice balls. Copper is 1.7 times more conductive than aluminum and three times heavier. So, when you unleash Meltdown, the extreme conductivity and weight of the solid copper press boldly melts and molds the ice. As Meltdown makes an ice ball, meltwater is channeled down the sides of the device along four TrickleDown Cascade grooves designed into the sidewall. This allows you and your guests to watch the cascading meltwater and the ice ball making process in action and, at the end, see the ice ball revealed for use in your drink of choice.