一桶普通的水，却能延缓温度变化。当冰库断电时，它默默吸收或释放热量，为食物争取时间——当然，紧急时也能泼出去灭火。(灭火暂未实现)
A simple barrel of water that can slow temperature changes. When the freezer loses power, it quietly absorbs or releases heat, buying time for food preservation — and, of course, it can also be used to douse fires in emergencies. (Firefighting feature not yet implemented.)
