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I was skeptical about getting perfectly clear ice without a machine, but these spheres come out impressively smooth and slow-melting. The silicone is flexible enough that popping them out takes no effort. My old cube trays are getting retired.

The spheres pop out effortlessly with a quick twist, and at 2.6 inches they chill my drink without watering it down too fast.

The spheres pop out cleanly thanks to the flexible silicone, and the 2.6" size fits my cocktail glasses perfectly. Four at a time is enough for a small get-together, though the mold does take up a fair bit of freezer space.