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

TSA officers will ask you to take out any container of liquid, gel, or aerosol that is 3.4 ounces (100 milliliters) or larger. This applies to every domestic and international flight departing from a U.S. airport. The rule exists because liquids can be used to create explosive devices, so TSA screens them separately from your carry-on bag.

You do not have a choice about this step. If you refuse to remove liquids, TSA will not let you through the checkpoint, and you will not be able to board your flight. The process takes about 30 seconds per passenger once you know what to remove.

Containers smaller than 3.4 ounces can stay in your bag, but TSA officers may still ask to see them. If you are unsure whether a container meets the size limit, remove it anyway — it speeds up your screening and prevents delays.

Key Takeaways

  • All liquid, gel, and aerosol containers larger than 3.4 ounces must be removed from your carry-on bag at the security checkpoint.
  • Containers 3.4 ounces or smaller can remain in your bag, but TSA may inspect them.
  • You must place removed liquids in a single clear plastic bag, one bag per passenger.
  • Checked baggage has no liquid size restrictions, so you can pack full-size bottles there instead.
  • TSA screens liquids separately and returns them to you after inspection, so you will not lose them.

What counts as a liquid under TSA rules

The TSA 3-1-1 rule covers more than water and juice. Any substance that flows, spreads, or sprays counts as a liquid, gel, or aerosol. This includes shampoo, conditioner, lotion, sunscreen, toothpaste, peanut butter, yogurt, honey, and jam. Deodorant, hairspray, and spray sunscreen are aerosols and must be removed. Mascara and liquid eyeliner are gels and must be removed.

Solid items do not count. Deodorant sticks, solid perfume, lipstick, and bar soap can stay in your bag. If you are unsure whether something is a liquid or a solid, the general rule is: if it would spill or spread if the container tipped over, remove it.

One common mistake is packing full-size bottles of medication. Prescription and over-the-counter liquid medications in containers larger than 3.4 ounces must be removed and screened, just like any other liquid. You can pack them in your carry-on if you remove them at the checkpoint, or you can pack them in checked baggage without size limits.

How to pack liquids for faster checkpoint screening

TSA requires all liquids to fit inside a single clear plastic bag, and that bag must be removed from your carry-on and placed in the security bin. The bag itself should be quart-sized (roughly 7 inches by 8 inches). You can buy pre-made TSA-compliant bags at most airports and drugstores, or use any clear plastic bag you have at home.

Pack your liquids bag so the containers are straightforward to see and remove. Place it on top of your carry-on or in an outside pocket so you can grab it without unpacking everything else. This single step cuts your checkpoint time in half because TSA officers do not have to dig through your bag.

If you forget to pack liquids in a bag, TSA will still screen them, but the process takes longer. Officers may need to inspect each container individually and may ask you to step aside while they do. Having everything in one clear bag means you move through the line faster.

Liquids in checked baggage have no size limits

You can pack full-size bottles of shampoo, lotion, perfume, and other liquids in your checked bag without any restrictions. TSA does not screen checked baggage the same way it screens carry-on bags, so the 3.4-ounce rule does not explore. This is the best option if you want to bring a full bottle of something you use regularly.

Checked baggage is loaded into the cargo hold after screening, so liquids will not spill on other passengers' belongings. However, pressure changes during flight can cause containers to leak, so pack liquids in the center of your bag, surrounded by clothes or towels that can absorb spills. Double-bagging bottles in plastic bags is also a good idea.

If you are checking a bag and carrying on a bag, you can split your liquids between them. Pack the full-size bottles you do not need during the flight in checked baggage, and pack travel-size versions (3.4 ounces or smaller) in your carry-on if you want to use them during the flight.

What happens to your liquids after you remove them

After you place your liquids bag in the security bin, it goes through an X-ray machine along with the rest of your carry-on. TSA officers watch the X-ray image to make sure nothing inside looks suspicious. In most cases, your bag comes back to you on the other side of the checkpoint within a few minutes, and you can repack it before heading to your gate.

Occasionally, an officer may need to open your bag and inspect a container by hand. This happens randomly and is not a sign that anything is wrong. The officer will open the container, smell or test it if needed, and return it to your bag. The whole process usually takes less than a minute.

You will not lose your liquids. TSA returns everything to you after screening. The only exception is if an officer finds something that is not allowed (such as a flammable substance), in which case they will tell you it cannot go on the plane and will not return it.

Exceptions and special cases

Medications in liquid form are treated the same as other liquids at the checkpoint — containers larger than 3.4 ounces must be removed and screened. However, you do not need to pack them in your liquids bag. You can tell the TSA officer that you have medication and place it in a separate bin if you prefer. This helps officers understand what they are screening and prevents confusion.

Breast milk and infant formula are exempt from the 3.4-ounce limit if you are traveling with a baby. You can bring any amount in your carry-on, but you must tell the TSA officer at the checkpoint that you have them. Officers may need to open and inspect the containers, but you will not have to remove them from your bag or place them in a liquids bag.

Duty-free liquids purchased after you pass through security can be brought on the plane in your carry-on, even if they are larger than 3.4 ounces. However, they must be in a sealed, tamper-evident bag provided by the duty-free shop. If the bag is opened or damaged, you will have to leave the items behind.

International flights and connecting flights

The 3.4-ounce rule applies to all flights departing from U.S. airports, whether they are domestic or international. If you are flying to another country, you must still remove liquids at the U.S. checkpoint before boarding.

If you are connecting through a U.S. airport, you will go through security again at the connecting airport. Any liquids you bought at duty-free after your first flight can stay in your carry-on if they are in the sealed duty-free bag. However, if you need to repack your bag or the seal is broken, you will have to remove liquids again at the connecting checkpoint.

Some international airports have different liquid rules for flights departing to other countries. If you are connecting to a flight that departs from a non-U.S. airport, check the rules of that airport or airline before you travel.

Frequently Asked Questions

Can I bring a water bottle through TSA if it is empty?

Yes. An empty water bottle is not a liquid and does not count toward the 3.4-ounce limit. You can bring it through the checkpoint empty and fill it at a water fountain or refill station after you pass security. Many airports have refill stations near gates.

What if I forget to remove liquids and TSA finds them in my bag?

TSA will stop you at the checkpoint and ask you to remove them. You will have the option to go back to the ticket counter and check your bag, throw the liquids away, or give them to someone not traveling. You will not be allowed to proceed through security with liquids in your carry-on.

Do I have to remove solid deodorant or only spray deodorant?

Only spray deodorant (aerosol) must be removed. Solid stick deodorant is not a liquid and can stay in your bag. The same rule applies to other products — solid versions do not need to be removed, but gels, creams, and sprays do.

Can I bring more than one liquids bag?

TSA rules say all liquids must fit in a single quart-sized bag. If you have more liquids than fit in one bag, you will need to check some of them or leave some behind. Most travelers can fit all their travel-size liquids in one bag without trouble.

Do I have to remove liquids if I have TSA PreCheck?

No. TSA PreCheck members do not have to remove liquids, shoes, belts, or light jackets at the checkpoint. You can leave your liquids bag in your carry-on and move through the PreCheck lane. This is one of the main benefits of TSA PreCheck membership.