Yes, liquids are allowed in carry-on bags when each container is 100 ml/3.4 oz or less and fits in a small clear bag.
You can bring liquids in hand luggage, but the rules are tighter than most people expect. One oversized bottle or a messy toiletries pouch is enough to trigger a bag search, a bin shuffle, and a sprint to your gate.
Below you’ll get the core limits, what counts as a “liquid,” how to pack it so it clears on the first pass, and the few cases where larger amounts are allowed. If you follow the packing flow, you’ll spend less time repacking and more time sipping a coffee past security.
What “Liquid” Means At Airport Security
At checkpoints, “liquid” usually includes gels, creams, pastes, and aerosols. If it can pour, spread, smear, or spray, treat it as a liquid item and pack it with your liquid set.
Items People Often Miss
- Toothpaste, hair gel, pomade, face wash
- Moisturizer, sunscreen, liquid makeup, lip gloss
- Peanut butter, yogurt, honey, jam, soft cheese
- Aerosols like deodorant spray or mini hairspray
If you’re close to the limit, switch one thing to a solid. Stick deodorant, bar soap, and shampoo bars cut the liquid load fast. For makeup, a powder compact often travels with less hassle than a bottle foundation.
Tricky “Sort Of Liquid” Items
Some items feel solid in daily life yet still behave like liquids at screening. Lip balm in a squeeze tube, shaving foam, and gel cold packs tend to get treated like liquids. If you’re not sure, put it in the liquids bag and you won’t have to debate it at the belt.
How The Standard Carry-On Liquid Limit Works
Across many countries, the baseline is simple: each container must be small (often 100 ml / 3.4 oz or less), and you group liquids together for screening. Some airports still want a clear, resealable bag. Some airports let liquids stay in your cabin bag. Pack as if you’ll need the clear bag and you’ll be ready for both.
What The Size Limit Really Means
Security cares about the container’s stated capacity, not how full it is. A 200 ml bottle that’s half empty is still treated as a 200 ml container. If you love a product, decant into a marked travel bottle so you don’t gamble on the day.
How To Pack Liquids So They Pass The First Time
Set up a small liquids kit you can lift out in one motion. It keeps you from digging at the belt, and it makes it clear to screeners that you’ve packed with the rules in mind.
Step-By-Step Packing
- Use clearly labeled containers. Pick bottles marked 100 ml/3.4 oz or less. If the label has rubbed off, swap it out.
- Decant only what you’ll use. Less volume means fewer leaks and more room for the items you actually need.
- Group every liquid together. That includes creams, gels, pastes, and aerosols, even if they live in different pockets at home.
- Use a clear, resealable bag. Keep it flat and easy to close. A basic zip bag is fine.
- Pack it near the top. You want it reachable without unpacking your whole carry-on.
Leak Fixes Worth Doing
- Leave a little air space in bottles so pressure changes don’t push product out.
- Wipe the threads clean so caps seal properly.
- For pump bottles, lock the pump or swap to a screw cap.
- For squeeze tubes, press air out before closing so the cap isn’t under pressure.
Can I Take Liquid In Hand Luggage? What Security Will Ask From You
In many standard lanes, you’ll be asked to take your liquids bag out and place it in a tray. Some airports with newer CT scanners let you leave liquids inside your bag, but don’t count on it unless signs at the checkpoint say so.
In the US, the TSA’s Liquids, Aerosols, and Gels rule lays out the 3-1-1 basics and the idea of a single, quart-size liquids bag.
If A Container Is Over The Limit
You’ll usually need to toss it, check your bag (if you have time), or hand it to someone outside security. Most airports won’t store it. If it’s a brand-new product you hate losing, keep it sealed, step aside, and decide fast so you don’t hold up the lane.
Common Liquids And How To Pack Them In Carry-On
If you’re unsure where an item belongs, treat it as a liquid and pack it with the rest. This quick reference also helps you decide what’s worth bringing in cabin baggage versus what can wait until you land.
| Item type | Best container plan | Checkpoint notes |
|---|---|---|
| Shampoo, conditioner, body wash | Travel bottle under 100 ml | Bar soap skips the liquid limit |
| Toothpaste and mouthwash | Mini tube or decanted bottle | Toothpaste counts as a paste |
| Sunscreen | Travel-size tube | Gel and lotion types both count |
| Makeup (foundation, concealer, mascara) | Small containers; caps tight | Many makeup items count as liquids |
| Hair spray, deodorant spray | Small aerosol under limit | Keep the cap on to stop accidental spray |
| Food spreads (peanut butter, jam) | Skip in carry-on if you can | Soft spreads are common “gotchas” |
| Contact lens solution | Small bottle or travel kit | Medical need may allow more, with screening |
| Perfume or cologne | Atomizer or mini vial | Wrap glass; keep inside liquids bag |
| Hand sanitizer | Mini bottle under limit | Keep reachable; it may get a closer check |
Rules That Change By Country And By Airport
Most places still run the 100 ml container rule. The process can vary: some lanes want the liquids bag out, some don’t. A few airports now allow larger containers in certain terminals, yet that can change by route, connection, or even by which lane you enter.
If you’re flying from the UK, the government’s page on hand luggage restrictions for liquids states the 100 ml container rule and notes that some airports may allow higher limits.
Connections Are The Trap
You might leave an airport that lets liquids stay in your bag, then connect through one that wants everything in a clear bag and screened separately. Pack so you can pull the liquids bag out fast on any leg. Also keep duty-free liquids sealed until your last flight is done.
What About Water Bottles
You can bring an empty bottle through security in hand luggage, then fill it after the checkpoint. If you show up with it full, it’s treated like any other liquid container and may be refused.
When You Can Carry More Than 100 Ml
There are exceptions for items you need during the trip, especially medical liquids and food for infants. Expect extra screening. Separate these items from your toiletries so you can present them without rummaging.
Medicines And Medical-Need Liquids
Keep liquid medicines in original packaging when you can. A prescription copy or a doctor’s note can help if screening gets slow. Put these items in an outer pocket so you can hand them over as a set.
Baby Milk, Formula, And Toddler Food
Pack baby feeding liquids together. Keep bottles sealed until screening starts. Staff may swab containers or ask you to open them, so build a few extra minutes into your buffer time.
Duty-Free Liquids
Duty-free liquids over 100 ml can be allowed when they’re sealed in tamper-evident packaging with the receipt inside. Keep them sealed until you’re done flying, especially on connections. If you’re tight on cabin space, place the sealed bag where it won’t get crushed.
Carry-On Vs Checked Bag: The Simple Split
Carry-on is for what you’ll use on the plane or right after landing: lip balm, hand sanitizer, travel toothpaste, maybe a small moisturizer. Checked baggage is for big bottles and backups. If you’re packing full-size toiletries, checked baggage usually saves hassle at security.
Liquids That Often Belong In Checked Baggage
- Full-size shampoo, conditioner, lotions, and hair products
- Large bottles of mouthwash or contact solution
- Food items like sauces, soup, big tubs of yogurt
- Glass bottles you’d hate to lose
Mistakes That Lead To Bag Searches
Bag searches don’t always mean you broke a rule. Sometimes an agent just needs a closer look. These are the patterns that trigger delays most often.
Mixing Liquids Across Pockets
If half your liquids are in a side pocket and the rest are buried in toiletries, your bag looks messy on the scanner. Put them together so screening is simple.
Bringing Soft Foods Without Realizing It
Peanut butter, hummus, and creamy dips are classic gotchas. If you want to travel with them, pack them in checked baggage or buy them after you land.
Relying On A Partly Empty Big Bottle
That half-full 200 ml bottle won’t pass. The printed capacity is what counts. Move the product into a small container with a clear size mark.
Exceptions And Proof To Carry For Larger Liquids
Bring small proof items when you can. It reduces back-and-forth at the belt and keeps the interaction short.
| Exception | What to carry | Extra packing tip |
|---|---|---|
| Liquid prescription medicine | Original label or prescription copy | Keep separate from toiletries |
| Over-the-counter liquid medicine | Box or bottle label | Carry only what you need for the trip |
| Saline, eye drops, contact solution | Product label | Pack upright to cut leaks |
| Baby milk or formula | Bottles, sealed cartons, or ready-to-feed packs | Group feeding items together |
| Breast milk | Storage bags or bottles, plus a cooler pack | Keep ice packs with the milk |
| Food for a medical diet | Packaging label | Pack in its own bag for easy screening |
| Duty-free liquids over the limit | Receipt inside sealed security bag | Don’t open the sealed bag mid-trip |
Pre-Flight Liquid Checklist
Do this the night before your flight. It’s the fastest way to avoid a last-second mess at security.
- Everything that pours, spreads, smears, or sprays is grouped together.
- Each container shows 100 ml/3.4 oz or less, unless it’s a true exception.
- The liquids bag closes flat and sits near the top of your carry-on.
- Exceptions like medicine and baby items are packed together and easy to present.
- Your water bottle is empty until you pass the checkpoint.
Pack this way and you’ll move through security with fewer surprises, less repacking, and less waste.
References & Sources
- Transportation Security Administration (TSA).“Liquids, Aerosols, and Gels Rule – Security Screening.”Defines the US 3-1-1 carry-on liquids rule and how liquids are screened at checkpoints.
- UK Government (GOV.UK).“Hand luggage restrictions: liquids.”States the UK 100 ml container rule and notes that some airports may allow higher limits.