Ningbo Sunwinjer Daily Products Co,.LTD
Ningbo Sunwinjer Daily Products Co,.LTD
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Airless bottles operate on a vacuum-driven dispensing principle:
Outer Shell – Typically made of plastic (PP, PET, ABS) or glass.
Pump/Dispenser Head – Pressing it releases the product.
Internal Piston (or Collapsible Bag) – Moves upward as the product is dispensed.
Base Plate – Seals the bottom and maintains vacuum pressure.
Diaphragm (in some designs) – Prevents air from re-entering.
When the pump is pressed, the piston rises, pushing the product out.
As the product is dispensed, the piston creates a vacuum, preventing air from entering.
No dip tube is needed (unlike traditional pumps), so nearly 100% of the product is used.
"Think of a syringe—when you press the plunger, the liquid is forced out without letting air back in."
