What is the Cream Pump Dispenser's airless pump bottle?

Unlike common dispensers that use a tube or straw to pump the product out, the airless pump bottle works with a vacuum mechanism.

The airless pump bottle consists of three parts:

Base: There is a small hole in the base that creates a vacuum effect and can suck in air
Plate: Inside the bottle, there is a plate (or disc) on which your skincare products are placed.
Pump: The suction action creates a vacuum effect to extract the product.
With each puff action, the product on the plate (inside the bottle) is pushed up by the vacuum effect - air enters the hole in the bottom of the bottle, pushes the plate containing the product, and pushes it up.

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