Hand Warmers?

Question: how do they keep hand warmers hot all day? whats inside of the packets? I was at a football game today and everyone had them.

Answer: It's a thick, clear liquid and when you click the metal disc inside, it causes a chemical reaction which heats the liquid and makes it hard. With most hand warmers, you boil them to to turn them back into liquid, so they can be used again and again.

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