Comments by "" (@billionai4871) on "Reusable handwarmers that get hot by freezing" video.

  1. I live in a pretty warm country, so we don't use these heat pads as hand warmers, because "who in their right mind would want to warm up here???", but rather we use them to warm up sore spots after exercise or getting hurt. I always found this an amazing thing and wanted an explanation for ages! Thanks for answering my request that I never actually made
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