I want a gadget that does the opposite of a microwave oven: Put your food in it, and 60 seconds later, it's cold! I could refreeze ice cream. Get a nice cold glass of water. Make ice cubes in minutes!
But until my dream is realized, we have the Tinchilla (tin chiller), which claims to cool a standard beverage can in 60 seconds using thermal conduction. It does this by spinning the can in icy water. This is supposed to quickly bring the entire contents of the can into contact with the cold surface of the can. I wonder if it works?