Reusable handwarmers that get hot by freezing

cfabbro
Wed, 03 Feb 2021 02:25:08 +0000

Link URL: https://www.youtube.com/watch?v=Oj0plwm_NMs

Comments URL: https://tildes.net/~science/uyx/reusable_handwarmers_that_get_hot_by_freezing

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