If you’ve spent any time in fancy cocktail bars, you’ve probably noticed that many of them serve drinks with a single, huge sphere of ice. Why do they do this? Well, mostly because it looks really cool, but it also dilutes your drink less quickly, which is important when you paid $14 plus tip.

Luckily, you can make these ice balls at home yourself, and a set of eight molds that will last for years costs less than a Old Fashioned at a nice bar.

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