Ascorbic acid has the same two enemies as retinol — oxygen and light — plus a third of its own: it is happiest at low pH, and low pH accelerates stress-cracking in PET. Airless in an opaque body, or glass, and never a clear PET bottle for a low-pH serum.
Vitamin C Serum is one of 1,273 formulas in the library that fall into this form. Across the whole library, 52% of them are built for a airless bottles — that is the format the form itself is designed around, not a preference we hold. If the formula you pick is lighter or heavier than the typical vitamin c serum, the recommendation moves with the viscosity, which is why every formula page in the library shows its own pack pairing rather than a category rule.
Typical textures in this group: Watery gel-serum, Light milky serum, Silky fast-absorbing serum, Slippery essence.













Avoid clear PET and avoid anything with a large headspace. A 30 ml bottle filled to 22 ml has more air in it than product in the headspace after a few uses, and the last third of the bottle is where customers notice the formula darkening.
These are six of the 1,273 formulas that match this form. Filter the full set on the serums page, or pair any mould above with any formula — one request, one quote covering both.
Send us the mould reference and the product form. We reply within 24 hours with one FOB price covering the fill, the decoration and the tooling position (there isn't one — every mould here is running), plus the compliance route for your destination market.
Start a combined quote →