We brought a few boxes of self-heating hotpot for the mountain trip.
Tips
usage
Most often attributive: 自热米饭 'self-heating rice,' 自热火锅 'self-heating hotpot,' 自热盒饭. The chemistry is calcium oxide (生石灰) + water → exothermic reaction; check the box for 'do not pierce or seal openings.'
A meal-kit category that exploded in China around 2017 — sealed plastic containers with a quicklime-and-water packet underneath that boil the soup in about 15 minutes. Hugely popular with college students, hikers, and during COVID lockdowns.
