20ml, 120ml or 500ml: Which Fragrance Refill Size Should Your Brand Sell?

Fragrance Refill Size Decides the Sales Path

Fragrance refill size decides how buyers test, purchase, store, and reorder the product. Use 20ml for trial, 120ml for retail refill sales, and 500ml for commercial replenishment.

Unalilia supplies all three sizes in a connected heavy-wall PET refill bottle family with matched CRC caps, heat induction foil liner options, oil-resistant label support, and carton-based packing. The structure gives brands one refill system instead of three disconnected packages.

20ml Is for Testing and Discovery

20ml sample bottles reduce the risk of the first purchase. Buyers can test scent strength, dry-down, cold-air scent machine performance, and room fit without committing to a full refill bottle.

Use 20ml for discovery kits, wholesale buyer samples, hotel scent trials, seasonal scent tests, and private-label launch kits. Heavy-wall PET makes the small bottle feel firm and clear instead of cheap or disposable, while keeping sample shipments lighter and safer than glass.

120ml Is for Standard Retail Refills

120ml is the practical retail refill size for many fragrance oil and diffuser refill brands. It gives enough product for normal use while staying manageable for e-commerce shipping, subscription bundles, and repeat consumer orders.

Use 120ml for online refill sales, home fragrance programs, scent refill bundles, and private-label retail lines. A clear PET bottle shows the oil color, and a matched CRC cap with the right liner option helps protect the product during parcel handling, warehouse storage, and customer delivery.

500ml Is for Commercial Replenishment

500ml works as the commercial refill tier. It fits hotel scenting, HVAC aroma diffusion, spa scent programs, office air-care, and larger B2B replenishment routines.

Use heavy-wall PET to reduce glass breakage risk while keeping a clean, transparent product presentation for professional buyers. The higher gram weight improves rigidity, helps resist carton pressure, and gives staff a more stable refill bottle during storage and service handling.

Keep the Same Cap and Label Logic

A three-size line needs consistent cap color, label layout, scent naming, and carton rules. Buyers should be able to recognize the same scent family whether they receive a 20ml sample, a 120ml retail refill, or a 500ml commercial refill.

Unalilia can help match bottle sizes with CRC caps, heat induction foil liner options, BOPP oil-resistant labels with matte or gloss lamination, and carton quantities for each size. This matters because fragrance oil can attack weak paper labels, loosen poor adhesives, and damage unprotected print.

Size Selection Matrix

Use this simple selection rule:

• 20ml: testing, discovery, buyer kits
• 120ml: retail refills and online sales
• 500ml: hotel, commercial, HVAC, and B2B replenishment

FAQ

Can one brand sell all three sizes?

Yes. A clear size ladder helps customers move from trial to retail refill to commercial replenishment without changing the brand system or label logic.

Which size is best for e-commerce?

120ml is usually the clearest e-commerce refill size, supported by 20ml samples for conversion. It gives enough product for real use while keeping parcel weight and packaging risk under control.

Which size should hotel scenting suppliers use?

500ml is the stronger commercial refill tier for regular replenishment. It supports hotel lobby scenting, HVAC scent machines, spa scent programs, and office fragrance maintenance better than small retail refill sizes.

Conclusion

Choose refill sizes by buyer behavior and service routine. Use 20ml to test, 120ml to sell, and 500ml to replenish commercial programs. Keep the PET bottle family, CRC cap system, oil-resistant label structure, and carton plan consistent across all three sizes.

CTA: Compare Unalilia 20ml sample bottles, 120ml refill bottles, and 500ml commercial refill bottles.