Carry-on toiletry bag: the 100 ml rule and the format that passes

A toiletry bag taken into the cabin must contain only bottles of 100 ml maximum, packed in a transparent, resealable one-liter plastic bag, i.e., approximately 20 x 20 cm. Only one bag is allowed per passenger, and it must be presented separately at security.

For checked luggage, the 100 ml constraint disappears: your cosmetics and beauty products travel in large formats, up to a limit of 0.5 liters per container and 2 liters in total per passenger. The majority of products refused at boarding are rejected simply for exceeding the milliliter limit, not because of their nature.

The 100 ml rule for liquids in the cabin

Any liquid, gel, paste, or aerosol product taken into the cabin must fit in a container of 100 ml maximum. This limit applies to the stated capacity of the bottle, not the amount remaining inside, which explains most confiscations at the security gate. A half-empty 150 ml tube of cream will be thrown away.

What are the rules for taking a toiletry bag in the cabin?

Liquids and aerosols must be placed in a transparent, resealable plastic bag with a maximum capacity of one liter, i.e., approximately 20 x 20 cm, and only one bag is allowed per passenger according to the rules published by the French public service. This bag is removed from the carry-on and placed alone in a bin during security screening.

The constraint therefore applies at two levels. Each bottle must comply with the 100 ml limit, and all bottles must fit into the one-liter volume. In practice, this represents between eight and ten travel-sized containers, which is more than enough for a one-week stay.

What is the maximum number of 100 ml bottles one can take?

There is no official number, only a volume constraint: everything that fits in the one-liter bag and closes properly is allowed. A bag that no longer closes is refused, even if each bottle respects the limit. The rule applies to all European airlines, from Air France to low-cost carriers, because it concerns airport security and not the commercial regulations of each individual carrier.

• Count on eight to ten 100 ml bottles to fill a one-liter bag without forcing
• Transfer shower gel and shampoo into empty bottles rather than buying travel sizes before every departure
• Check the capacity printed on every tube, including toothpaste, which is often sold in 125 ml

For details on the products covered and specific cases, our complete guide on the airline liquids rule reviews every category of container.

Which toiletry bag to choose for the plane

The ideal bag for the cabin is transparent, waterproof, and calibrated to the size of the regulatory bag, i.e., approximately 20 x 20 cm. An opaque bag is not prohibited as such, but it requires taking all bottles out one by one in front of the security officer.

What should the size and material of the toiletry bag for the plane be?

Aim for 20 x 20 cm in transparent PVC or TPU, with a waterproof zipper. This material withstands leaks caused by the drop in pressure during ascent, cleans with a sponge, and allows the contents to be seen by X-rays and the officer alike. Models with reinforced zips last for several years, whereas a simple freezer bag tears after two trips.

A bag that is too large poses the opposite problem: if it exceeds one liter in volume, the officer may ask you to empty it and repack the bottles in a bag provided on-site, if any remain.

Transparent bag or classic vanity case?

The two complement each other. The transparent bag holds only the liquids subject to the rule, and the vanity case or classic toiletry kit transports everything else: toothbrush, solid soap, comb, razor, powder makeup. This separation saves long minutes at the security screening checkpoint, as only the transparent pouch needs to be removed.

• One-liter transparent bag for shower gel, shampoo, cream, perfume, and liquid deodorant
• Soft vanity case for solids, accessories, and compact makeup
• Separate waterproof pouch for opened products that might leak

Toiletry bag in the cabin or checked luggage

If you check a bag, put most of your liquids in it and keep only what is strictly necessary for the trip in the cabin. This is the only way to carry a 200 ml perfume bottle or family-sized shower gel without transferring anything.

Be careful, however: the hold lifts the 100 ml limit, not every limit. Airlines apply a ceiling of 0.5 liters per container and 2 liters of toiletry items in total per passenger, a rule published by Qatar Airways, Emirates, and Condor, among others. An ordinary traveler remains well below this, but a family distributing their products into a single suitcase may approach it.

Should you put your toiletry bag in checked or carry-on luggage?

In the hold as soon as you have checked baggage: the 100 ml limit does not exist there, only the ceiling of 0.5 liters per container and 2 liters in total applies. Keep a small emergency kit in the cabin with a toothbrush, travel-sized toothpaste, and moisturizer, which is useful if your suitcase arrives a day late. Airlines compensate for delayed baggage, but never for the time spent buying replacement products locally.

What remains prohibited, even in checked luggage

The hold eases the milliliter limit, but it does not lift the prohibition on flammable products. An aerosol hairspray or nail polish remover can travel in checked luggage, within the limit of 0.5 liters per container, whereas a lighter never has a place there. Spray valves must remain protected by their cap to avoid accidental discharge during the flight.

A final point concerns the locking of baggage. On a flight to the United States, a suitcase locked with a non-TSA padlock can be forced during an inspection, toiletry bag included. A TSA padlock can be reopened with an official master key, which avoids finding your suitcase ripped open on the carousel upon arrival.

The full list of items banned from both types of luggage can be found in our article on items prohibited in carry-on luggage.

What to put in your toiletry bag for the plane

An efficient cabin bag contains eight to ten items, all in travel size. Cabin air often falls below 20 percent humidity, compared to 30 to 60 percent in a normal room, which dries out skin and mucous membranes on a long flight.

Which skincare products are essential for air travel?

A moisturizer, lip balm, saline solution, and toothbrush cover the essentials. On a flight longer than six hours, add a thermal water spray and cleansing wipes, which do not count as liquids since they do not pour.

• Moisturizer and lip balm, as dry cabin air dehydrates in a few hours
• Shower gel, liquid soap, and shampoo in 100 ml bottles, or as solid soap to stay outside the regulatory bag
• Toothbrush and travel-sized toothpaste, checked at 75 ml rather than 125 ml
• Stick deodorant, which escapes the liquids rule unlike sprays
• Compact makeup and solid beauty products, to be stored outside the transparent pouch
• Wipes and tissues, outside the regulatory plastic bag

The kit is completed according to the destination. On a long-haul Air France flight to Asia, a folding toothbrush and solid soap are enough to freshen up during a layover without opening the checked luggage.

Razors, scissors, and sharp objects: what passes

Disposable razors and cartridge razors are allowed in the cabin; bare safety razor blades are not. Nail scissors pass as long as the blade does not exceed 6 cm, the official threshold beyond which the object becomes prohibited in the cabin. Tweezers and nail clippers pose no problem.

Medications, prescriptions, and baby products

A liquid medication exceeding 100 ml remains allowed in the cabin with proof, a prescription, or a medical certificate in the passenger's name. The same logic applies to baby formula and baby food, carried in the quantity necessary for the outbound journey, the stay, and the return. Present the document spontaneously at security; this avoids discussion at the gate.

Getting through security without wasting time

Going through the security screening checkpoint takes less than thirty seconds when the bag is prepared. Remove the transparent bag before reaching the conveyor belt, place it in a separate bin with electronic devices, and leave the rest of your toiletries in your carry-on.

How liquid screening works

The luggage goes through the X-ray while the officer checks the plastic bag by eye. An unidentifiable bottle or illegible capacity triggers a manual check, sometimes an explosive detection test using a strip. Nothing to worry about, but this second trip through the X-ray adds two to three minutes, multiplied by the number of passengers behind you.

The security officer can refuse any non-compliant container on the spot. Before abandoning a product, ask the departure airport about the alternatives it offers: the DGAC cites checking it as hold luggage or using a left-luggage service to retrieve it upon return. It is still better to sort before boarding than to negotiate three meters from the belt. Upon arrival, customs may check the quantities of cosmetics brought back from outside the European Union, a subject distinct from airport security.

Liquids bought in duty-free

A perfume or bottle bought after security travels in a sealed bag provided by the shop, with the receipt visible inside. This bag must not be opened before arrival, on pain of confiscation during a connection. Apart from medicines, baby food, and justified special dietary needs, this is the only way to carry a bottle of more than 100 ml in the cabin.

Where to buy a toiletry bag approved for the plane

Pharmacies, supermarkets, and sports retailers all offer transparent bags in the regulatory format. A zippered freezer bag technically works for a round trip, but it pierces quickly and does not protect against leaks.

What is the price for a compliant bag and where to find one?

Expect to pay from 2 to 40 euros depending on the material and finish. The price follows the lifespan: a disposable plastic bag lasts for one trip, a reinforced TPU bag lasts several years.

The maximum dimensions to keep in mind remain those of the regulatory sachet, one liter of volume. A bag sold as "airplane special" with larger dimensions has no official value: only volume counts at security.

For regular use, a TPU bag with a waterproof closure and a complementary storage pouch is a sound investment. Our travel accessories include organizers, pouches, and tags designed to structure a carry-on suitcase. And if you are preparing for your first flight, the list of what you can take in your carry-on is a useful addition to this preparation.

Conclusion

A toiletry bag for the plane comes down to two numbers: 100 ml per bottle and a total capacity of one liter in the cabin. The rest goes in checked luggage, with no volume restrictions. Prepare your transparent bag the night before, check the capacity printed on each tube rather than the remaining amount, and going through security becomes a formality.

Frequently asked questions about toiletry bags on planes