Most of us know how to put a warm can of soda or beer on top of the ice and slowly roll 'walk' it with index and middle finger for 4 minutes to make it ice cold. Just putting it in the freezer would take about 25~35 minutes. Why not build a battery operated set of soft rubber rollers to simulate your fingers. This would work in the freezer ice tray, a bowl of ice, or your favorite cooler on the beach.
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