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 larger than 3.4 ounces (100 milliliters) and place them in a separate clear plastic bag before you reach the security scanner. This applies to every airport in the United States. The officer at the checkpoint will ask you to remove this bag so it can be scanned separately from your other belongings.

Liquids smaller than 3.4 ounces can stay in your carry-on bag and do not need to go in the separate bag, though many travelers remove them anyway to speed up the process. Items in checked baggage have no liquid restrictions, so you can pack full-size bottles and containers in your suitcase without limit.

The rule exists because the TSA treats liquids as a potential security risk in the cabin of an aircraft. Even if you have traveled many times before, the rule does not change — it applies to every single trip through a U.S. airport security checkpoint.

Key Takeaways

  • All liquids, gels, and aerosols larger than 3.4 ounces must come out of your carry-on bag and go into a clear plastic quart-sized bag at security.
  • Containers smaller than 3.4 ounces can stay in your carry-on, though removing them speeds up the screening process.
  • You can pack full-size bottles and containers in your checked baggage with no restrictions.
  • The TSA provides free quart-sized bags at security checkpoints if you do not bring one, though arriving with your own bag saves time.
  • Common items that count as liquids include toothpaste, shampoo, conditioner, lotion, sunscreen, peanut butter, yogurt, and liquid makeup.

What counts as a liquid under the 3-1-1 rule

The TSA defines liquids broadly to include anything that flows, spreads, or sprays. This covers obvious items like water, juice, and shampoo, but also includes peanut butter, yogurt, honey, jam, and other spreadable foods. Toothpaste, deodorant, sunscreen, lotion, and liquid or gel makeup all count. Aerosol cans — including spray deodorant, hairspray, and spray sunscreen — are also liquids under this rule.

Solid items do not count. A bar of soap, a stick of deodorant, a solid perfume, or a jar of face mask powder can stay in your carry-on bag without restriction. The difference is whether the item would pour, spread, or spray if the container opened.

Gels present a gray area. Solid gels like hair gel or aloe vera gel are treated as liquids and must follow the 3-1-1 rule. If you are unsure whether something counts, the safest approach is to pack it in your checked bag or assume it is a liquid and place it in the quart-sized bag.

How to pack liquids correctly for the checkpoint

Bring a clear plastic quart-sized bag — roughly 7 inches by 8 inches — and place all containers larger than 3.4 ounces inside it. Each container itself must be 3.4 ounces or smaller; you cannot bring a 6-ounce bottle just because you have room in the bag. Seal the bag and keep it easily accessible in your carry-on, not at the bottom where you will have to dig for it.

The TSA provides free quart-sized bags at security checkpoints if you arrive without one, but this slows down your screening. Bringing your own bag from home takes seconds and keeps the line moving. You can reuse the same bag on every trip.

At the checkpoint, remove the bag and place it in the bin with your shoes, belt, and jacket. Do not open the bag or remove individual containers unless an officer asks you to. The bag goes through the X-ray machine separately so the officer can see each item clearly.

Exceptions and special cases

Medications in liquid or gel form are exempt from the 3-1-1 rule, though you should inform the officer that you are carrying them. Bring the medication in its original labeled container if possible. Insulin, for example, does not need to go in the quart-sized bag.

Baby formula, breast milk, and baby food are also exempt and do not need to be in the quart-sized bag. You can bring these items in any quantity. Tell the officer at the checkpoint that you have them so the screening can proceed smoothly.

Duty-free liquids purchased after you pass through security — such as alcohol or perfume bought in the airport shop — can go in your carry-on bag without restriction, since they were already screened. Keep the receipt and the bag sealed if possible.

What happens if you forget to remove liquids

If you reach the scanner with liquids still in your carry-on bag, the officer will stop you and direct you back to the checkpoint area. You will have to remove the liquids, place them in a bag, and go through the screening process again. This delays your screening and can make you late for your flight, especially during busy travel times.

You may be asked to leave the liquids behind if there is no time to reschedule your screening. The TSA does not confiscate liquids as a penalty — they straightforward cannot allow them through — but losing a full bottle of expensive sunscreen or shampoo is frustrating and avoidable.

Arriving at the checkpoint 15 to 20 minutes early gives you a buffer if something goes wrong. This is especially important during peak travel times like early morning, evening, and holiday periods.

Liquids in checked baggage have no restrictions

You can pack full-size bottles of shampoo, lotion, sunscreen, and other liquids in your checked suitcase without any limit. There is no 3.4-ounce rule for checked bags. This is the best option if you need to bring large quantities of liquids and do not want to worry about the carry-on restrictions.

Keep in mind that checked bags can take a few hours to arrive after you land, so if you need liquids during your flight or when ready upon arrival, you will need to pack them in your carry-on in 3.4-ounce containers or smaller. Many travelers pack a small toiletry bag in their carry-on for this reason.

Frequently Asked Questions

Can I bring a water bottle through security?

An empty water bottle can go through security in your carry-on. Once you pass the checkpoint, you can fill it at a water fountain or refill station. A full water bottle counts as a liquid and must be packed in your checked bag or left behind.

Do I have to remove small liquids from my bag?

Containers 3.4 ounces or smaller do not have to go in the quart-sized bag and can stay in your carry-on. However, removing them anyway speeds up the screening process, since the officer does not have to examine your bag as closely.

What if I have more liquids than fit in the quart-sized bag?

You can only bring what fits in one quart-sized bag. If you have more liquids than that, pack the extras in your checked baggage. The one-bag limit is firm and applies to every traveler.

Are solid deodorants and solid perfumes allowed in carry-on bags?

Yes. Solid stick deodorant, solid perfume, and solid soap do not count as liquids and have no restrictions. Only spray deodorant, liquid perfume, and gel products must follow the 3-1-1 rule.

Do I need to remove the quart-sized bag if I am going through TSA PreCheck?

TSA PreCheck members do not have to remove the quart-sized bag, shoes, or belt at the checkpoint. You can leave liquids in your carry-on bag and proceed through the expedited screening lane.