how to use the humidifier bottle of the hydrogen inhalation? what is the function of the humidifier bottle?

Because there are two rubber pads on the top of the humidification cup to make the wet cup fit more tightly. It was a bit tight when used for the first time.

You can shake the humidification cup left and right to loosen it, and pull it out with force.

How to use it you can see this video :https://www.youtube.com/watch?v=AAYHlNA88x8

The cup functions:When water is added in winter, it can moisten the gas, and in summer, it can filter out excess water in the gas. you can add water or not add water.