When the airless bottle is in use, hold down the top, and the bottom piston will run up to squeeze out the contents. When the contents of the bottle are used up, the piston will go to the top. When the piston reaches the bottom, the vacuum bottle can be removed. Disassemble the pump head and other parts and install it again, then you can use it repeatedly.

The vacuum bottle uses the contraction force of the spring to prevent outside air from entering the vacuum bottle. Use atmospheric pressure to push the piston at the bottom of the bottle forward. The contents of the airless bottle can be completely isolated from the air to prevent the product from being oxidized and deteriorated and the growth of bacteria due to contact with the air, and the high-tech concept is used to upgrade the product.

The vacuum bottle in the market is composed of a cylinder into an ellipsoid container and a piston placed at the bottom. Its design principle is to use the contraction force of the spring to prevent air from entering the bottle, creating a vacuum state, and to use atmospheric pressure to push the piston at the bottom of the bottle forward. However, due to spring force and atmospheric pressure, sufficient force cannot be given.

Therefore, the piston should not be too tightly attached to the bottle wall, otherwise the piston will not be able to move forward due to excessive resistance; on the contrary, if the piston is to move forward easily and material leakage is prone to occur, the vacuum bottle has very high requirements for the professionalism of the manufacturer. .