Eye-catching and ultra slow-melting, ice spheres are a clever alternative to traditional ice cubes—and this tray from Peak makes it easy to create four at a time. Simply fill the molds with water using the funneled filling points, and then freeze. The BPA-free silicone tray is stabilized by a rigid support structure, and the dual-sealing design prevents liquid from leaking out, ensuring easy transport from sink to freezer.