1, that is, accidentally colliding with each other. When the water is turned on in the boiling water room in the university, there are more people gathered in the time period, and the probability of collision is greater.

2. In winter, the thermos bottle is too cold and suddenly filled with boiling water, which is easy to explode due to uneven heating. Especially boys don't usually use boiled water, so open water bottles are generally cold and easy to explode.

This is the main reason why the thermos bottle in the university is broken. Many people use hot water to boil hot water in the dormitory, often dumping the remaining hot water in the thermos and then putting it into cold water immediately. The thermos contracts quickly, and of course it will explode. So this is what we should pay attention to!