How to Choose Packaging for Serum

A serum is the highest-value product in most routines and the most sensitive to packaging. Two decisions determine the right pack: how stable the active is, and how much should be dispensed per use.

Start with the active

Active	Stability risk	Recommended pack
Ascorbic acid (vitamin C)	High — oxidises with air and light	Airless, opaque or coated
Retinol / retinal	High — oxidises, light sensitive	Airless, opaque
Peptides	Moderate	Airless or dropper
Hyaluronic acid	Low	Dropper bottle
Niacinamide	Low	Dropper or pump bottle
Facial oils	Low	Dropper bottle with glass pipette

Dropper bottle

The dropper bottle is the default for stable serums and oils: familiar ritual, flexible dosing, lower cost. A standard pipette delivers about 0.04–0.05 ml per drop, 20–25 drops per full compression.

Choose it when the formula is stable, the brand story involves a ritual, and cost matters. Choose something else when the active oxidises.

Airless bottle

An airless serum bottle prevents air returning to the pack. Typical specifications for a 30 ml serum:

• Dose per stroke: 0.20–0.25 ml
• Doses per fill: roughly 130–150
• Evacuation: about 93%
• Priming: 3–5 strokes

For vitamin C and retinol this is the only pack that removes the main degradation pathway during use.

Treatment pump bottle

A treatment pump sits between the two: a fine nozzle and a smaller dose (0.10–0.30 ml) with no airless mechanism. It suits fluid serums where metering matters but oxidation is not critical.

Capacity and use period

Capacity	Dose	Use period at 2 uses/day
15 ml	0.15 ml	~50 days
30 ml	0.20 ml	~75 days
30 ml	0.25 ml	~60 days
50 ml	0.25 ml	~100 days

Match the fill to the pao period and to the price you intend to charge per month of use.

Material and finish

Thick-wall PETG gives a glass-like look; PP supports refill and mono-material construction; acrylic collars and hot-stamped rings add premium weight. For light-sensitive actives, choose opaque or coated bodies and carry branding in print or foil.

MOQ and lead times

Stock dropper bottles start at 1,000 pcs and decorated orders at 3,000 pcs. Airless formats start at 3,000 pcs. Sampling runs 5–20 working days and production 15–30 working days after approval.