You can carry perfume or cologne on a plane in hand luggage as long as each container is 100 ml / 3.4 oz or smaller and all liquids fit in one transparent resealable bag of about one litre (one quart) — the US TSA "3-1-1" rule and the EU and UK liquid rules agree on this. The limit is the size printed on the bottle, not the amount left in it. In checked baggage, perfume is treated as a toiletry: widely published limits are 0.5 L per item and 2 L in total, with alcohol above 70% ABV not permitted. Sizes that pass in the cabin: 2 ml vials, 5–10 ml travel sprays, 30 ml, 50 ml and 100 ml flacons. Always check your carrier and departure airport before flying.
The rules, as widely published
These are general public rules, restated here so the packaging logic below makes sense. They are not legal advice and airports vary — confirm with your airline and departure airport before you fly.
| Rule | Hand luggage (cabin) | Checked luggage (hold) |
|---|---|---|
| US — TSA "3-1-1" | Each liquid, gel, cream or aerosol container 3.4 oz / 100 ml or less; all containers in one quart-size resealable bag; one bag per passenger | Perfume and cologne allowed as toiletries; alcohol-based toiletries fall under the dangerous-goods passenger allowance (see below) |
| EU | Containers of 100 ml or less in one transparent resealable bag of about 1 litre; some airports with CT screening have relaxed the bag rule, but 100 ml is still the safe assumption in 2026 | Allowed within the toiletry allowance; duty-free liquids sealed in a tamper-evident bag with receipt |
| UK | Same 100 ml container / 1-litre bag rule; airport-by-airport relaxations exist and are withdrawn without notice | Allowed within the toiletry allowance |
| Toiletries containing alcohol (perfume, cologne, aftershave) | Within the 100 ml rule | Widely published passenger limit: up to 0.5 L (or 0.5 kg) per item and 2 L (2 kg) in total across all such articles — this is separate from the 5-litre / 24–70% ABV rule for alcoholic drinks |
| Alcohol content | No separate cabin rule for perfume | Beverages over 70% ABV are prohibited; the toiletry allowance above governs perfume regardless of its ethanol content, and most fine fragrance is 70–90% ethanol |
Three practical readings. First, the limit is the container size printed on the pack, not what is left inside: a half-empty 150 ml bottle is refused, a full 100 ml passes. Second, the bag is the constraint people forget — a 100 ml flacon, a 100 ml toner and a 100 ml sunscreen fill a quart bag. Third, duty-free bought after security travels sealed in a tamper-evident bag, which is why airport perfume is sold in 100 ml and 50 ml and almost nothing larger.
Which perfume bottle sizes pass
Every standard fragrance size was designed around this rule. The commercial spine — 30 / 50 / 100 ml, labelled 1 oz, 1.7 oz and 3.4 oz — stops exactly at the ceiling, and the discovery layer of 2 ml vials and 5–10 ml travel sprays sits comfortably under it. What does not exist is a 120 ml perfume, and the reason is this table.
| Size | Label | Cabin? | Typical flacon Ø × height, mm | Sprays at 0.1–0.2 ml |
|---|---|---|---|---|
| 2 ml vial | 0.07 oz | Yes | Ø10 × 45–55 | 10–20 |
| 5 ml mini spray | 0.17 oz | Yes | Ø15–20 × 50–60 | 25–50 |
| 10 ml travel spray | 0.34 oz | Yes | Ø15–18 × 80–95 | 50–100 |
| 30 ml | 1 oz | Yes | Ø35–45 × 80–100 | 150–300 |
| 50 ml | 1.7 oz | Yes | Ø45–55 × 95–120 | 250–500 |
| 100 ml | 3.4 oz | Yes — the ceiling | Ø55–65 × 110–140 | 500–1,000 |
| 120 ml and above | 4 oz+ | No (checked only) | Not made as a perfume step | — |
The perfume bottle sizes guide covers the conversions and the spray maths in depth, and the cosmetic bottle size guide puts the skincare sizes beside them. A "100 ml" flacon that is brim-full at 105–115 ml (drawings carry a brim-full capacity held to ±5% and a fill line below it) is still a 100 ml container for the rule, because the declared capacity is what is read.
The packaging angle: travel atomizers, 5–10 ml
The cabin rule created a product category. A travel atomizer is a 5–10 ml spray that either ships filled as a mini of the main fragrance or is sold empty and refilled from the 50 ml at home. Three formats cover the market, all on the fragrance bottles page:
- Glass travel spray, 5–10 ml. Drawn tubular glass Ø15–Ø20 on a mini screw fine-mist pump, 0.1 ml per shot, or a 15/415 screw neck on a 10 ml. High-flint glass, so it reads as the same object as the flacon. Stock, in the low hundreds to low thousands.
- Aluminium refillable atomizer. An anodised aluminium sleeve over a glass or PP inner, filled from the bottom by pressing onto the parent bottle's pump. The plastic in the fluid path has to be alcohol-rated: ordinary PET fails above about 30% ethanol — it swells, hazes and deforms — so the inner is glass or alcohol-rated PETG with a proven gasket, stated as a compromise.
- Roll-on, 5–10 ml. For perfume oils rather than alcohol sprays: a PP roller housing with a steel or glass ball, a tamper-ring cap and a housing gasket tested against the oil, which attacks standard NBR/TPE.
Sourcing them is the same route as the flacon: stock glass 500–1,000 pieces, stock pumps about 1,000 in silver or gold, screen print from about 2,000, sprayed colour 2,000–5,000 per shape (3,000–5,000 on clear perfume glass), a custom-tone anodised collar 10,000. Factory-gate lead time is 15–25 days on stock and 30–40 days sprayed. Ranges and routes are on travel size perfume bottles and atomizers and the MOQ index; conversions for the spec sheet are on the unit converter.
Why perfume leaks on planes, and the tests that catch it
A pressurised cabin sits at roughly the pressure of 1,800–2,400 m altitude, about 0.02–0.025 MPa below sea level. Air trapped in the headspace expands, and if the seal at the pump or cap is marginal, the juice weeps. Then it sits in a hot hold or a hot car, and the same headspace expands again. Fragrance packaging QC is designed for exactly this, and the thresholds are harder than any flight:
| Test | Method | Pass threshold |
|---|---|---|
| Vacuum leak | Filled unit, lying and inverted, in a vacuum chamber | −0.08 MPa for 15 minutes for volatile bulks (three to four times the cabin drop); weight loss ≤0.5%; no trace outside the seal |
| Inverted dwell | Filled, sealed, held inverted and on its side | 45°C for 24 hours; no weep at neck, cap or pump |
| Crimp seal under warmth | Crimped atomiser samples held warm | 20 samples at 40°C for 48 hours; any leak at the crimp seat fails |
| Thermal cycling | Oven and freezer, filled | 48°C for 48 h, −15°C for 48 h; no cracking, leakage or decoration change |
| Collar torque | Torque meter on crimped or screwed collar | Crimp 58.8–224 N by diameter; screw cap opening torque 0.2–0.7 N·m; no loosening |
| Drop, capped and filled | 1.5 m at 45° onto concrete | No functional damage; transit breakage target ≤0.3% |
Two design choices follow from the physics. A crimp (FEA 15) pump is permanent and gas-tight, which is why prestige minis are crimped; a screw (15/415) pump can be refilled but relies on its gasket and torque, so the gasket has to be PTFE-coated or solvent-grade for an ethanol bulk. And a travel atomizer should be filled to its fill line, not the brim — the headspace is the expansion room. The full pump protocol is on QC standards and the crimp-versus-screw decision on crimp vs screw pump.
For brands: what the rule means for your range
Design the flagship at 100 ml and never above it. Build the travel set from 5, 10 and 15 ml components on the same neck logic as the flacon, so the pump and cap references carry over. Decide the discovery layer with the flacon, because the decoration house colour-matches the family in one run and retrofitting a matching mini later is a second set-up. And one boundary: a packaging supplier ships empty bottles; once filled, alcohol-based fragrance is a dangerous-goods shipment, and that classification and its carrier belong to your filler and forwarder. The component minimums and the crimp-or-screw question are on the perfume bottle supplier page and fragrance packaging solutions; the questions to ask a supplier about leak testing are on how to evaluate a China packaging supplier.
Vella is a Guangzhou-based beauty packaging solutions provider — a sourcing partner, not a factory — that helps indie and emerging beauty brands specify, source, sample, quality-control and ship complete fragrance packaging systems from vetted partner factories operating to ISO 22716 / GMP. Travel and discovery formats are specified with the flacon so one pump, one collar and one colour run serve the whole family; a brief can go to contact.
Frequently asked
Building a travel or discovery set?
We match it to the flacon.
Tell us the parent bottle and the sizes you need. We reply within 24 hours with travel spray, atomizer and vial options on the same neck logic, with minimums and the leak-test sheet.
Send a brief →