PET & PP Refillable Airless Bottle — 30ml & 50ml | Custom OEM

Your Serum Customers Finish a Bottle — and Then They're Gone

You've built a serum worth rebuying. But when the bottle's empty, your customer throws the whole thing away — outer shell, pump, inner bottle — and the next purchase decision starts from scratch. Every repurchase is an open competition, and single-use packaging doesn't give your brand a structural advantage in winning it.

We hear this from brands building retention-first skincare lines: the refill intent is there, but the packaging doesn't make it easy enough for consumers to actually follow through. The inner bottle replacement feels unfamiliar, the outer shell doesn't feel worth keeping, and the refill program stays a concept rather than a consumer habit.

This refillable airless bottle pairs a PET outer shell — transparent, impact-resistant, worth keeping — with a lightweight PP inner bottle your consumer replaces each refill cycle. The outer shell is the part they see, hold, and display. The inner bottle is the part they swap. Available in 30ml and 50ml to support serum lines and lotion SKUs. Browse our full range of refillable airless packaging if you're comparing formats before deciding.

Specifications

Customization & Recommendations

Will consumers actually replace the inner bottle — or will they just toss the whole thing?

This is the right question, and most packaging suppliers skip it. Brands using Mintel's 2026 research as a benchmark find that consumer refill follow-through depends on two things: the outer shell feels worth keeping, and the replacement step feels simple. The PET outer shell in this format is transparent and has a weighted, quality feel — most consumers want to hold onto it. The PP inner bottle replacement is designed to click or slide out without tools.

The practical recommendation for brands: pair the packaging with a clear refill narrative — on-pack instructions, a QR code to a refill purchase page, or a subscription model. The packaging does the mechanical part; your brand does the communication part. Request a sample to test the replacement cycle before production.

My serum contains vitamin C, niacinamide, or a peptide complex — is PP the right material for the inner bottle?

PP is a strong match for most water-based serum actives: vitamin C in aqueous solution, niacinamide, hyaluronic acid, and peptide complexes are among the most common serum ingredients, and PP handles them well in standard formulations. Brands using high-alcohol bases (above roughly 50%) or substantial concentrations of essential oils should note that these formulas sit closer to the edge of PP's tolerance — request a sample and test with your specific formula before committing to production.

For light-sensitive actives like retinol or vitamin C: the PET outer shell is transparent, so if your formula requires opaque light protection, specify a colored or frosted outer shell at the customization stage — Pantone-matched opaque finishes are available on the PET shell.

30ml or 50ml — which size makes the stronger case for a refill-based serum line?

30ml is the stronger starting point for a DTC serum refill program: the initial purchase price fits the $40–80 range most direct-to-consumer serum brands work in, and the refill inner bottle at a lower unit price reinforces the cost-benefit narrative consumers respond to. 50ml makes more sense for a retail or clinic channel, where the larger format justifies a higher price point and the shelf presence reads as a more serious skincare investment.

If you're building a two-SKU serum line, both sizes can share the same outer shell design — your brand mark, color, and surface finish stay consistent, and the two formats look like a matched set on shelf. For more detail on sustainable format options across PCR, mono-material, and refillable structures, see what your brand needs to know about PCR, mono-material, and refillable options.

Can I apply gradient color, Metallization, or a frosted finish to the PET outer shell — or is the decoration limited?

PET takes Silk Screen Printing, Hot Stamp, and Gradient Color spray well — these are the most commonly specified finishes for this format. Frosted surface treatment and Metallization are available and hold on PET, though Metallization is more typically applied to opaque outer shells; confirm with us at the sampling stage if that's the direction you want to go. The PP inner bottle can be Pantone-injected independently.

One consideration specific to PET: a fully clear outer shell shows the PP inner bottle's color through the wall — which some brands use intentionally to display a formula color or branded inner bottle tint. If you want a solid outer shell appearance, a Pantone-pigmented injection or gradient spray on the PET achieves that. Tell us your brand's visual direction at the sample brief stage and we'll confirm the right finish.

Frequently Asked Questions

Does the airless pump in the PP inner bottle maintain its performance after multiple inner bottle replacements?

The pump mechanism sits within the PP inner bottle itself — each replacement brings a fresh pump, so performance doesn't degrade with repeated refill cycles. The PET outer shell and actuator head are the reused components.

Does the clear PET outer shell let in enough light to affect vitamin C or retinol formulas during storage?

A clear PET outer shell allows light transmission, which matters for light-sensitive actives. For vitamin C or retinol formulas, specify an opaque Pantone-colored or frosted outer shell — both are available in this format and fully resolve the light exposure concern.

Can the 30ml and 50ml versions share the same PET outer shell design — or do they require separate tooling?

The 30ml and 50ml outer shells are different sizes and require separate tooling. However, both can be specified with the same surface finish, Pantone color, and logo placement so the two SKUs read as a matched set on shelf.

Can brands order replacement PP inner bottles as a separate SKU for their refill program after the initial production run?

Yes — the PP inner bottle can be ordered as a standalone item after the initial production run, at MOQ 10,000 units. This is the structure most refill-program brands use: sell the full bottle first, offer inner bottle refills at a lower price point in subsequent orders.

Not sure which option fits your formula? Chat with our team — we reply in 2 hours.

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