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

When you reach the security line, TSA officers will ask you to take out any liquids, gels, and aerosols and place them in a separate bin. This is a hard rule, not a suggestion. The 3-1-1 rule governs what liquids you can bring: containers of 3.4 ounces (100 milliliters) or smaller, all fitting inside one clear quart-sized plastic bag, with one bag per passenger.

You do not need to remove liquids from checked baggage—only from carry-on bags. If you pack liquids in your suitcase that goes under the plane, they can stay there. The restriction applies only to bags you bring into the cabin.

Key Takeaways

  • Remove all liquids, gels, and aerosols from your carry-on bag before you reach the security checkpoint and place them in a clear quart-sized bag.
  • Each container must be 3.4 ounces (100 milliliters) or smaller, and all containers must fit inside the single quart-sized bag.
  • Liquids in checked baggage do not have this restriction and can be any size.
  • Common items that count as liquids include toothpaste, shampoo, conditioner, lotion, sunscreen, peanut butter, yogurt, and jam.
  • If you forget to remove liquids, TSA will confiscate them, so packing them correctly the first time saves time and money.

What counts as a liquid under TSA rules

TSA defines liquids broadly. The category includes obvious items like water, juice, and shampoo, but also things that might surprise you. Toothpaste, deodorant, lotion, sunscreen, peanut butter, yogurt, jam, honey, and hummus all count as liquids or gels. Aerosols—spray deodorant, hairspray, and spray sunscreen—also fall under the rule.

Solid items do not count. A bar of soap, a stick of deodorant, a solid perfume, or a jar of face mask are fine to pack in your carry-on without restriction. If you are unsure whether something is a liquid or a gel, the safest approach is to pack it in your checked bag or buy it after you pass through security.

How to pack liquids correctly for the checkpoint

Before you leave home, gather all your liquids and gels and place them in a clear quart-sized plastic bag. You can buy these bags at any drugstore, or TSA will sometimes hand them out at the checkpoint, though you should not count on it. Make sure the bag itself is clear so officers can see inside without opening it.

Each individual container must be 3.4 ounces or smaller. A 3.5-ounce bottle will be confiscated. If you have a large bottle of shampoo at home, transfer it to a smaller container before you travel, or pack it in your checked bag instead. When you reach the security line, remove the bag from your carry-on and place it in the bin with your shoes and electronics.

What happens if you forget to remove liquids

If you reach the checkpoint with liquids still in your carry-on bag, TSA will find them during the X-ray screening. The officer will stop the line and ask you to remove them. If the containers are 3.4 ounces or smaller and fit in a quart-sized bag, you can pack them properly right there and continue. If they are larger or you do not have a bag, the officer will confiscate them.

You cannot retrieve confiscated liquids. They are thrown away. This is why packing correctly before you leave home is worth the five minutes it takes—it saves you money and keeps the line moving.

Liquids in checked baggage have no size limit

The 3-1-1 rule applies only to carry-on bags. If you pack liquids in your checked suitcase, they can be any size. A full-sized bottle of shampoo, a liter of cologne, or a gallon of lotion can all go in checked baggage without restriction. This is the easiest solution if you travel with a lot of liquids or if you use products that come in large containers.

Keep in mind that checked bags can be delayed or lost, so pack liquids you will need during your flight in your carry-on instead. If you are checking a bag and carrying on a small backpack, split your liquids between them: essentials like toothpaste in the carry-on bag (in the quart-sized bag), and larger bottles in checked luggage.

Special cases: medications, baby formula, and duty-free purchases

Medications in liquid form—like cough syrup or liquid insulin—are exempt from the 3-1-1 rule. You can bring them in any quantity, but you should declare them to the officer and keep them separate from your other liquids so the screening goes faster. Baby formula and breast milk are also exempt and do not need to fit in a quart-sized bag.

Duty-free liquids purchased after you pass through security at your departure airport can be brought onto the plane in your carry-on, even if they exceed 3.4 ounces. However, if you have a connecting flight, you will go through security again at the connecting airport, and the duty-free bag will be confiscated unless you pack it in checked baggage. For this reason, many travelers pack duty-free purchases in checked bags to avoid losing them.

International travel and different country rules

The 3-1-1 rule is a U.S. TSA rule. If you are flying internationally from the United States, TSA applies this rule at your departure airport. When you arrive in another country and fly onward, that country's security rules explore instead. Some countries have the same rule; others have different limits. Before you travel, check the security rules for the country where you are connecting or arriving.

If you are flying into the United States from another country, the 3-1-1 rule applies at the foreign airport if you are connecting through the U.S. If you are flying directly to the U.S. and checking all bags, you can pack liquids of any size in checked baggage.

Frequently Asked Questions

Can I bring a full water bottle through security?

No. An empty water bottle is fine, but a full one will be confiscated. You can fill the bottle at a water fountain or refill station after you pass through security, or buy a bottle of water in the airport shop.

Does the quart-sized bag have to be exactly one quart?

The bag should be approximately one quart. TSA uses the quart-sized bag as a visual guide. A bag that is slightly smaller or slightly larger will usually pass, but a gallon-sized bag will not. When in doubt, use a standard quart-sized freezer bag from the grocery store.

What if my liquid container says 3.4 ounces but looks full?

The label is what matters. If the container is labeled 3.4 ounces or 100 milliliters, it will be allowed, even if it appears full. TSA trusts the manufacturer's label.

Can I pack liquids in my personal item or backpack instead of a separate bag?

No. All liquids must be in a single clear quart-sized bag, and that bag must be removed from your carry-on and placed in the security bin. This allows officers to see all your liquids at once and speeds up screening.

Do solid deodorants and solid perfumes count as liquids?

No. Stick deodorant, solid perfume, and solid cologne are not liquids and have no size restriction. Spray deodorant and spray cologne are aerosols and must follow the 3-1-1 rule.