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Why hasn't anyone invented the opposite of the microwave?

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I've always wondered why not!

Why isn't there a "freezer" and no, I am not talking about the second part to a refrigerator. Like when you have cold food/drink and you want it hot, you put it in the microwave and it heats it up. But what about when you have something hot that you want cold? You have to sit it in the freezer and wait forever for it to be cold. Why isn't there something like a microwave but cools down instead of heats up? Or is there??