The working principle of the hand sanitizer bottle is the same as that of the piston pump. The movement of the piston is used to discharge the air in the liquid storage cylinder, forming a pressure difference between the inside and the outside, so that the liquid rises under the effect of the air pressure and is discharged from the liquid outlet tube out of the tube. When the liquid pipe is pressed down by hand, the tension spring is squeezed so that the liquid inlet valve (round plastic ball) is closed downward, because the piston moves downward, and the exhaust valve (the small hole under the piston) When it is opened, the liquid in the liquid storage cylinder flows out of the liquid outlet pipe; when it is loosened, the tension spring returns to its original natural state, causing the piston to move upward, the exhaust valve is closed, and the liquid inlet valve is opened. Under the effect, the liquid enters the liquid storage cylinder from the catheter through the liquid inlet valve. In this way, the piston reciprocates up and down in the cylinder, continuously sucking the liquid out of the bottle.

The development of hand sanitizer has driven the bottle packaging industry. Our common hand sanitizer bottle is a pump squeeze type. This kind of hand sanitizer bottle is more convenient to use, and the amount of use can also be well controlled. Many companies and manufacturers will choose this kind of hand sanitizer bottles. In fact, its working principle is the same as that of piston pumping. The movement of the piston is used to remove air, forming internal and external air pressure, and the liquid will be discharged out of the pipe through the liquid outlet pipe.