The Tovolo Clear Sphere System is our go-to for bar-worthy clear ice at home. Its clever design freezes from the top down—the gray “sacrificial chamber” and insulating foam push bubbles and impurities to the bottom, so you get crystal-clear spheres every time. It does take up a bit of freezer real estate, but the results are worth it, and we have a few tips for best performance: make sure every silicone piece and the green bases are firmly seated to avoid leaks, fill from the center until you see the water line through the top, then do your final top-off once it’s already in the freezer. Make a few batches ahead for cocktails or a show-stopping punch bowl—these slow-melting spheres elevate every pour.