Yes, you must remove liquids from your carry-on bag at TSA checkpoints

The TSA's 3-1-1 rule requires you to take out all liquids, gels, and aerosols from your carry-on bag and place them in a single quart-sized clear plastic bag before you reach the security checkpoint. This applies at every TSA checkpoint in the United States, with no exceptions for frequent travelers or TSA PreCheck members (though PreCheck does speed up the process).

The rule exists because liquids can be harder to screen with X-ray machines alone. By removing them and placing them in a clear bag, officers can see what you're carrying and screen the bag separately if needed. This takes about 10 to 15 seconds per traveler but catches potential threats that might otherwise be missed.

Liquids you pack in checked baggage do not need to follow the 3-1-1 rule—you can pack full-sized bottles there. The restriction applies only to what you carry onto the plane in your hands or in a carry-on bag.

Key Takeaways

  • All liquids, gels, and aerosols in carry-on bags must be 3.4 ounces (100 milliliters) or smaller and placed in a single quart-sized clear plastic bag.
  • You must remove the bag from your carry-on and place it in a bin at the security checkpoint before you reach the scanner.
  • Liquids in checked baggage have no size restriction and do not need to be bagged.
  • TSA PreCheck members still must follow the 3-1-1 rule, but they can leave shoes, belts, and light jackets on during screening.
  • Common items that count as liquids include toothpaste, shampoo, conditioner, lotion, sunscreen, peanut butter, and yogurt.

What counts as a liquid under TSA rules

The TSA defines liquids broadly to include anything that flows, spreads, or is pourable. This covers obvious items like water, juice, and shampoo, but also includes things many travelers don't expect: toothpaste, deodorant (gel or spray), sunscreen, lotion, peanut butter, yogurt, honey, jam, and cosmetics like foundation or mascara.

Solid items like lipstick, solid deodorant, or a bar of soap do not count as liquids and can stay in your carry-on bag. The difference is whether the item will pour or spread if the container tips over. If you're unsure about a specific item, the TSA website has a searchable "What Can I Bring?" tool, or you can ask an officer at the checkpoint before you unpack.

Frozen items are treated as liquids if they are still partially frozen or slushy at the checkpoint. A completely solid frozen item (like a frozen water bottle) may be allowed, but it's safer to pack frozen items in checked baggage to avoid delays.

The 3-1-1 rule: container size, bag size, and placement

The rule has three parts. First, each individual container must hold 3.4 ounces (100 milliliters) or less. Second, all containers must fit inside a single quart-sized clear plastic bag—roughly 7 inches by 8 inches. Third, you must remove that bag from your carry-on and place it in a bin at the checkpoint before you go through the scanner.

The TSA provides free quart-sized bags at checkpoints, but bringing your own saves time. You can buy them at drugstores, grocery stores, or online. Make sure the bag is clear so officers can see inside without opening it.

Pack the bag so the opening faces up and nothing is crammed in. If an officer needs to inspect a container, they should be able to reach it without dumping everything out. Overstuffed bags often get unpacked at the checkpoint, which slows down the line.

How TSA PreCheck and other programs handle the 3-1-1 rule

TSA PreCheck members still must follow the 3-1-1 rule—there is no exception for liquids. However, PreCheck does allow you to leave your shoes, belt, and light jacket on during screening, and you go through a dedicated, usually shorter line. This means you spend less time waiting, but you still need to remove your liquids bag and place it in a bin.

Other trusted traveler programs like Global Entry or NEXUS do not exempt you from the 3-1-1 rule either. The rule applies to all passengers at all U.S. airports, regardless of membership status.

If you travel frequently and find the 3-1-1 process annoying, PreCheck is worth considering for the overall time savings at checkpoints, even though liquids handling stays the same.

What happens if you forget to remove liquids at the checkpoint

If an officer finds a liquids bag still in your carry-on when it goes through the X-ray scanner, they will stop the bag and ask you to remove it. You then have a choice: go back and pack the liquids into a quart-sized bag, or throw the items away.

Most travelers choose to throw away the items rather than delay the line further. This is why packing your liquids bag last, on top of your carry-on, makes sense—you can grab it quickly and place it in a bin without fumbling.

If you have expensive items like prescription creams or high-end skincare, pack them in checked baggage instead. That way, even if you forget to remove them from a carry-on, you have a backup.

Packing liquids for checked baggage

Liquids in checked baggage do not have to follow the 3-1-1 rule. You can pack full-sized bottles of shampoo, lotion, sunscreen, or any other liquid. However, the TSA still recommends placing them in a separate bag or wrapping them in plastic to prevent leaks from damaging your other belongings.

Pressure changes in the cargo hold can cause containers to leak or burst, especially if they are full. Leave a little air space in bottles, or use travel-sized containers even in checked bags if you want to be extra cautious.

Some items are banned from both carry-on and checked baggage—like flammable liquids, certain paints, or large quantities of alcohol. These are rare for typical travelers, but if you're packing something unusual, check the TSA website or ask at the ticket counter before you pack.

Common mistakes to avoid

The most common mistake is packing liquids in your carry-on without a quart-sized bag or with containers larger than 3.4 ounces. This forces you to throw items away or unpack at the checkpoint, delaying your journey.

Another mistake is forgetting that items like toothpaste, deodorant, or sunscreen count as liquids. Many travelers pack these in their carry-on thinking they're solid and then are surprised when an officer stops them.

A third mistake is packing the liquids bag deep inside your carry-on. When you reach the checkpoint, you have to dig through everything to find it, holding up the line. Pack it on top or in an straightforward-to-reach pocket.

Finally, some travelers assume TSA PreCheck or other programs exempt them from the 3-1-1 rule. They don't. Every passenger, regardless of status, must follow the same liquids rule.

Frequently Asked Questions

Can I bring a full water bottle through security if I fill it after the checkpoint?

Yes. You can bring an empty water bottle through security and fill it at a water fountain or refill station after you pass the checkpoint. Many airports have these stations near gates. This saves money and avoids the hassle of packing liquids.

Do I have to remove my liquids bag if I'm in TSA PreCheck?

Yes. TSA PreCheck does not exempt you from the 3-1-1 rule. You still must remove your liquids bag and place it in a bin. PreCheck speeds up other parts of screening, like keeping shoes on, but the liquids rule stays the same for everyone.

What if my prescription cream is larger than 3.4 ounces?

Prescription medications in liquid or gel form are exempt from the 3.4-ounce limit if they are medically necessary. Pack them separately from your other liquids, and be ready to show the prescription or label to an officer if asked. Keep the original container with the pharmacy label whenever possible.

Can I pack a full-sized shampoo bottle in my checked bag?

Yes. Checked baggage has no size limit for liquids. You can pack full-sized bottles of shampoo, lotion, sunscreen, or other liquids. Wrap them in plastic or place them in a separate bag to prevent leaks from damaging your clothes.

Are gel insoles or gel packs considered liquids?

Gel insoles and cooling gel packs are usually allowed in carry-on bags because they are not pourable. However, if they are in a sealed pouch that could leak, some officers may ask you to pack them in checked baggage instead. When in doubt, ask an officer before you unpack.