Travel sizes are not a gimmick — they are a reliable, repeat-purchase tier for skincare and haircare brands. The constraint is the 100 ml carry-on limit.
Bottles from our catalogue — 50–100 ml bottles for travel kits.
Stay at or under 100 ml
Bottles of 50 ml and 100 ml both clear cabin rules, so they are the safe anchors for a travel kit. We tool 50 ml PET and 100 ml PE bottles precisely for this.
Mix formats in one kit
Pair a 50 ml serum/dropper, a 100 ml lotion or shampoo, and a small mist to cover a routine. Matching neck finishes keeps closures interchangeable.
Sell the set
Travel kits convert well as gifts and trial acquisitions; consistent colour and decoration across the set is what makes it look designed rather than cobbled.
| Step | Bottle | Closure |
|---|---|---|
| 1 | 50 ml PET | Dropper |
| 2 | 100 ml PE | Lotion pump |
| 3 | 100 ml PET | Mist |
Related: cosmetic bottles.
Compliance note: For cosmetics, materials and decoration must stay compliant. Shijin bottles and inks meet FDA cosmetic requirements and the EU Cosmetics Regulation (EC 1223/2009), under ISO 9001:2015 quality management.
Leak-proofing for the baggage hold
The 100 ml carry-on limit is only half the travel problem — the other half is the pressure change in an aircraft hold, which pushes liquid past weak seals. Travel bottles need tight, well-threaded closures and, ideally, a tamper or gasket seal that holds through pressure swings. A flimsy flip cap that is fine on a counter will leak at 10,000 metres.
Test every travel format with the actual closure, filled, in a pressurised cycle — not just an empty bottle. Matching neck finishes across the kit also lets one spare cap serve the whole set.
Selling travel as a trial
The travel kit’s real value is as a trial that converts. A customer who tries the travel size of a serum or shampoo and likes it is the most likely full-size buyer, so the kit should lead with the hero product and make upgrading obvious.
Pricing it as a gift or starter set — rather than a discount-bin item — positions the brand as worth the full-size purchase later, which is where the travel tier pays for itself.
Building a coherent kit, not a collection
- Anchor the kit on 50 ml and 100 ml — both are carry-on compliant.
- Pair a 50 ml dropper or serum, a 100 ml lotion or shampoo, and a small mist to cover a full routine.
- Use one masterbatch colour and one neck family across the set so it looks designed, not cobbled.
- Sell the kit as a gift or trial acquisition to lift basket size and introduce the full-size range.
A travel kit that looks intentional is a brand statement the customer carries with them — and reorders.
Buyer checklist before you order
Lock these four things before requesting a quote: the fill volume and the headspace you need above it; the closure type (dropper, pump, spray or cap) and its neck size; the decoration (silk-screen, hot-stamp or label); and the certification your market requires.
Getting the neck finish right first saves the most time — it decides which closures will ever fit, and it is cheaper to confirm than to re-tool.
Common sizing mistakes
| Model | Material | Capacity | Neck |
|---|---|---|---|
| SJT0036 | PET | 36 ml | 32 mm |
| SJT0084 | PET | 200 ml | Custom |
| SJT0299 | PET | 299 ml | Custom |
| SJE1797 | PE | 120 ml | 20 mm |
The usual error is specifying the bottle by its marketing size (a ’50 ml’ bottle) while the closure and label were specced for a different neck. Match the declared capacity to the actual internal volume, not the printed number, and the fill line stays clean.
The second mistake is ignoring headspace. A viscous product needs more air above the fill than a thin one, so size the bottle to the fill plus the space the capper and shipper require.
From decision to first sample
Once the size, material and closure are set, ask for a stock-mold sample rather than waiting on a custom tool. You can validate the bottle on your own line in days and confirm the closure seats before any tooling commitment.
Bring the actual formula to the sample call — a bottle that looks right empty can behave differently once filled, and the real fill is what the stability and drop tests should run against.
If you only remember one thing
Specify the neck finish before anything else. It is the one dimension that locks the closure, the capper and the label, and fixing it late is the most expensive change in the whole programme.
Everything else — colour, decoration, even the exact capacity — can flex around a confirmed neck.
Frequently Asked Questions
What size is TSA-compliant?
Containers of 100 ml (3.4 oz) or less per item are carry-on compliant.
Can travel bottles be custom coloured?
Yes — same masterbatch as your full-size range keeps the kit on-brand.
Do travel bottles leak on planes?
Only if the closure is weak — cabin pressure changes push liquid past flimsy seals. Use tight, gasketed closures and test the filled bottle through a pressure cycle.
What sizes should a travel kit include?
50 ml and 100 ml anchors — both carry-on compliant — covering a dropper, a lotion or shampoo, and a mist.
Explore our full bottle catalog or contact our team for custom tooling and low-MOQ production runs.