Slingshots aren't just good for firing toilet brushes and Oreos: with a little thought, you can even use one to cool a beer.
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Everyone's favorite slingshot expert, Joerg Sprave, explains in this video how a little bit of elastic—and effort—can be used to chill a beer to 6 celsius below room temperature. Sure, using a fridge might be easier, but where would be the fun in that? [YouTube]