What is a vacuum bottle?
A vacuum bottle refers to a container that can isolate the gas from the outside temperature or a container that isolates external bacteria.
( Cosmetic Container Plastic Vacuum Bottle Can Hold Sunscreen )
Cosmetic Airless Bottle:
The contents of the vacuum bottle can be completely isolated from the air, preventing the product from oxidative deterioration and breeding bacteria due to contact with the air, and enhances the product quality with its high-tech concept. The vacuum bottle commonly used 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 the air from entering the bottle, resulting in a vacuum state, and to use the atmospheric pressure to push the piston at the bottom of the bottle forward. However, since the spring force and atmospheric pressure cannot give enough force, the piston cannot be attached too tightly to the bottle wall, otherwise the piston will not be able to rise and move forward due to excessive resistance; Therefore, the vacuum bottle has very high requirements for the professionalism of the manufacturer.