What is the principle of pneumatic thermos?

Originally, the pneumatic thermos was designed according to the principle of air compression. Its pressurized water mechanism consists of a press, an air pump, a bottle stopper, a drainage pipe and a water outlet pipe. The air hole below the air pump is matched with the eyelet of the bottle stopper. When in use, press the top presser by hand, and the air in the air pump will be injected into the bottle liner through the hole of the bottle stopper, so that the air in the bottle is compressed. In this way, the water in the bottle will automatically flow out of the drain pipe through the bottle mouth.