A metal-free airless bottle dispenses product with a vacuum-driven piston and an all-plastic pump, so there is no metal spring in the pump. Airless bottles limit the formula's exposure to air and let users dispense most of the product, which is why they are popular for creams, serums and sensitive formulas. APG's Eternal Pump airless bottle is a PP, mono-material design in 15ml, 30ml and 50ml sizes.
How an airless bottle works
A standard pump bottle uses a dip tube. As the user dispenses product, air flows into the bottle to replace it. An airless bottle works differently. It has no dip tube. Instead, a movable piston or disc sits at the base of the bottle.
Each press of the pump draws a dose out of the top. That creates a small vacuum, and the piston rises to fill the space. Air does not flow in behind the product. Over time the piston moves all the way up, pushing product toward the pump until the bottle is close to empty.
This design has three practical effects:
- Less air exposure. The formula is not in contact with a growing headspace of air as it is used.
- Good evacuation. Users can get most of the product out, which reduces waste and complaints about product left in the bottle.
- Any-angle use. Because there is no dip tube, many airless bottles work when held sideways or upside down.
Where metal fits into a conventional airless pump
Many conventional airless pumps use a small steel spring to return the actuator after each press. Some also include metal in a decorative collar or overshell. These parts can make an otherwise plastic package harder to recycle, because metal hidden inside a pump complicates sorting and reprocessing.
A metal-free airless bottle replaces the spring with a plastic design. That keeps metal out of contact with the formula and removes a common barrier to recycling. When every part is also made from the same plastic family, the package can be described as mono-material.
All-plastic vs mono-material airless
These terms are often used together, but they mean different things. "All-plastic" or "metal-free" means there is no metal. "Mono-material" means the parts are made from a single plastic family, such as PP. A bottle can be all-plastic and still mix PP and PE. Mono-material goes a step further.
APG offers two mono-material airless bottles: the Eternal Pump airless bottle (PP) and the mono all-plastic airless pump bottle. For a deeper look at why mono-material matters for airless packaging, see the benefits of mono-material airless pumps for skincare. Our article on all-plastic vs mono-material packaging covers the terms in more detail.
Airless vs other dispensing formats
| Format | How it dispenses | Best for | Trade-offs |
|---|---|---|---|
| Airless bottle | Piston rises as product is pumped out; no dip tube | Creams, serums, eye products, formulas you want to protect from air | Higher part count than a simple pump; piston fit must suit the formula |
| Lotion pump with dip tube | Draws product up a dip tube; air replaces it | Lotions, body care, larger sizes | More air contact; some product left in the bottle |
| Treatment pump | Small dose from a fine pump, usually with a dip tube | Serums, foundations, thin formulas | Not airless; dose is smaller than a lotion pump |
| Dropper | User fills a pipette by squeezing a bulb | Oils and serums applied drop by drop | Opened at each use, so more air exposure |
What brands should check before switching
- Formula fit. Airless bottles handle a wide range of creams and serums, but very thin liquids and very thick balms can behave differently. Test viscosity, dose consistency and priming with your final formula.
- Size range. The Eternal Pump airless bottle comes in 15ml, 30ml and 50ml. Plan your range around these sizes, or ask us about the mono all-plastic airless pump bottle as an alternative.
- Filling. Airless bottles are usually filled with the piston in place and then capped. Share your filling method so we can talk through fit with your line or your filler.
- Decoration. The Eternal Pump airless bottle offers decoration options. Plan artwork early so decoration fits your launch schedule.
- Stability and compatibility. Run your standard stability program with filled samples. Check for leaks, dose changes, piston movement and any change in the formula.
- Claims. Use "designed for recyclability" and "recyclable where facilities accept it". Mono-material helps, but local acceptance still varies, so avoid wording that suggests the package is recyclable everywhere.
- Commercial terms. Ask us about lead times and minimums through our quote request form so they fit your plan.
How APG can help
APG makes cosmetic and personal-care packaging, with a plant in Defiance, Ohio for molding and decoration, and holds an EcoVadis Platinum rating. For airless and related formats, start with:
- Eternal Pump airless bottle: PP, mono material, in 15ml, 30ml and 50ml with decoration options.
- Mono all-plastic airless pump bottle: a second mono-material airless option.
- All-plastic treatment pump: PP with a full over cap, for serums and thin formulas that do not need an airless system.
- Infinity V2 Lotion Pump: PP mono all-plastic, up-lock, 1.5cc dosage.
- All airless packaging.
To see every all-plastic option side by side, browse our metal-free pumps and sprayers. If you are weighing airless against a pump for a serum, see metal-free treatment pumps for serums.
Common questions
Is every airless bottle metal-free?
No. Many airless pumps use a metal spring. Check the component list or ask your supplier. APG's mono-material airless bottles are all-plastic.
Is a metal-free airless bottle the same as a mono-material airless bottle?
Not always. Metal-free means no metal parts. Mono-material means all parts are the same plastic family. The Eternal Pump airless bottle is both: it is PP and mono-material.
What sizes does the Eternal Pump airless bottle come in?
It comes in 15ml, 30ml and 50ml. These sizes suit serums, eye creams, face creams and trial or travel formats.
Does an airless bottle keep the formula away from air completely?
It limits air exposure because no air flows in to replace the product. It is not a hermetic seal, so continue to rely on your normal preservative and stability testing.
Can airless bottles be decorated?
Yes. The Eternal Pump airless bottle offers decoration options. Share your artwork and finish goals when you request a quote.
Ready to test your formula in a metal-free airless bottle? Request samples or a quote.