Every year, travelers surrender an enormous amount of skincare at airport security — usually because of a rule they thought they understood. Here is exactly what TSA allows in 2026, what counts as a liquid, and how to get a full routine through a checkpoint without losing a thing.
The short answer
Each container must be 3.4 oz / 100 ml or smaller, all of them must fit in one quart-sized clear bag, and you get one bag per passenger. That is the 3-1-1 rule. Anything larger gets thrown away, no matter how full it is.
What the 3-1-1 rule actually means
The name is a memory aid: 3.4 ounces per container, 1 quart-sized bag, 1 bag per traveler. Two details trip people up more than any others.
First, the container size is what counts, not how much is left inside it. A 200 ml moisturizer with two applications remaining is still a 200 ml container, and it will be pulled. Officers judge the label, not the contents.
Second, the bag must genuinely close. A quart bag straining at the seams can be rejected, and everything in it re-screened or discarded.
What counts as a liquid
TSA's definition is broader than most people assume. If it can pour, spread, spray, pump or squeeze, it's a liquid.
| Treated as a liquid | Not treated as a liquid |
|---|---|
| Toner, essence, micellar water | Bar cleansers and solid soap |
| Serums and face oils | Solid balms and stick products |
| Moisturizer, eye cream, sunscreen | Powders under 12 oz |
| Cleansing oil and makeup remover | Sheet masks |
| Gel masks, aerosol sprays | Single-use sealed capsules |
The five items most often confiscated
- Full-size sunscreen. Most bottles start at 150 ml — over the limit before you've used any.
- Micellar water. Sold in large bottles and nearly impossible to decant cleanly.
- Moisturizer in a jar. Jars are often over 100 ml and are also the likeliest thing to crack open in a bag.
- Cleansing oil. Usually 150–200 ml, and among the messiest to lose in transit.
- Aerosol mists. Pressurized containers draw extra scrutiny even when they're small.
What happens to confiscated items
They are not held for you, mailed back, or stored. Items removed at the checkpoint are discarded immediately. A $90 serum is simply gone — which is why the rule is worth planning around rather than testing.
International differences worth knowing
The 100 ml limit is close to universal, but enforcement is not. The EU and UK follow the same 100 ml standard, and several airports now use CT scanners that let you keep liquids in your bag — though the size limit still applies at most of them. Japan and Australia enforce the limit strictly and often ask you to remove the bag separately. When in doubt, assume the strictest interpretation; you'll never be penalized for being under.
Four ways to travel with a full routine
1. Decanting into travel bottles
Cheap and flexible, but time-consuming, prone to leaks at altitude, and you lose track of what's in each unlabeled bottle. Cabin pressure changes push product out of any container that isn't perfectly sealed.
2. Buying travel sizes
Convenient, but expensive per ounce, and many brands don't offer their full range in small formats — so your routine gets edited by what happens to be available.
3. Switching to solids
Bar cleansers and balms sidestep the rule entirely. The tradeoff is limited options for toners, essences and serums, which simply don't exist in solid form.
4. Single-use capsules
Each capsule holds a fraction of a milliliter, sealed individually. The container size question effectively disappears, nothing can leak into your clothes, and a full multi-step routine fits in a pocket. This is the approach Lumière was built around.
One sheet. Zero liquid anxiety.
Twelve sealed capsules a day — a complete six-step routine for morning and night that walks through security without a second glance.
Shop the CapsulesA checkpoint checklist
- Check every container's printed size, not how full it is.
- Put the quart bag where you can reach it without unpacking.
- Keep sunscreen accessible — it's the most common flag.
- Prescription skincare can exceed the limit but must be declared.
- Anything you'd hate to lose belongs in a checked bag, or shouldn't come.
Frequently asked questions
3.4 ounces (100 ml) or less per container. The size on the label is what's judged, not the amount inside.
Yes — one quart-sized clear resealable bag per passenger, and it needs to close properly.
Single-use capsules hold a fraction of a millilitre each and are individually sealed, putting them far below the 100 ml container limit. Most travelers carry them without using the liquids bag at all. The officer on duty always has final discretion.
Bar cleansers, solid balms and sticks, powders under 12 oz, and sheet masks. If it pours, spreads, sprays or squeezes, it's a liquid.
It's removed and discarded at the checkpoint. Nothing is stored or returned.
Rules can change and individual officers have discretion. Check tsa.gov before flying, and your destination's aviation authority for the return leg.