TSA liquid rules have not changed as of early 2025

The 3-1-1 rule for liquids in carry-on bags remains in effect: containers of 3.4 ounces (100 milliliters) or smaller, all fitting inside a single quart-sized clear plastic bag, one bag per passenger. This rule has been in place since 2006 and TSA has not announced changes to it for 2025.

Checked baggage has no liquid restrictions — you can pack full-size bottles, gels, and pastes in your checked bag without limit. The 3-1-1 rule applies only to what you carry onto the plane.

If you have seen posts or videos claiming TSA changed the liquid rules, they are either describing the existing rule in new language, discussing a proposal that did not pass, or referring to temporary changes at specific airports during peak travel periods (which are not permanent rule changes).

Key Takeaways

  • Carry-on liquids must be 3.4 ounces or smaller per container, all fitting in one quart-sized bag.
  • Checked baggage has no liquid limits — pack full bottles there instead.
  • The 3-1-1 rule has not changed since 2006 and remains the standard for 2025.
  • Some airports test faster screening lanes or PreCheck-style programs, but these do not change what liquids you can bring.
  • Gel deodorant, toothpaste, peanut butter, and yogurt count as liquids under TSA rules.

What counts as a liquid under TSA rules

TSA defines liquids broadly to include anything that flows, spreads, or sprays. This covers the obvious ones — water, juice, shampoo, conditioner — but also items many travelers do not expect: gel deodorant, toothpaste, peanut butter, honey, jam, yogurt, pudding, and cosmetics like foundation or concealer. Solid deodorant, bar soap, and lipstick are fine in carry-on.

Aerosols (spray cans) follow the same 3.4-ounce limit. Medications in liquid or gel form count as liquids, though you can bring them in reasonable quantities for your trip — TSA does not require you to prove a prescription, but the amount should match your actual need.

If you are unsure whether something counts, the TSA website has a searchable database called "What Can I Bring?" where you type the item name and it tells you the rule. You can also ask a TSA officer at the checkpoint before you open your bag.

How to pack liquids for a carry-on flight

Get a clear quart-sized plastic bag — the kind with a zip-top seal. One bag per passenger. Fill it with containers of 3.4 ounces or smaller. You do not have to fill the bag completely; you just cannot exceed the size limit or bring more than one bag.

At security, remove the bag from your carry-on and place it in the bin by itself. Do not put it back in your bag until after you have cleared the checkpoint. TSA officers need to see it clearly and may need to open it for inspection.

If you are traveling with a child, you can bring baby formula, breast milk, and juice in quantities larger than 3.4 ounces — tell the officer at the checkpoint before screening begins. These items do not have to go in the quart bag.

Checked baggage liquid rules

Pack as many full-size bottles and containers as you want in your checked bag. There is no ounce limit, no bag requirement, and no restriction on quantity. The only limits are the airline's baggage weight and size restrictions.

Make sure containers are sealed and will not leak during handling. If you are worried about spills, wrap bottles in plastic bags or pack them in a separate toiletries case. Checked bags are tossed around, so find lids matter.

Hazardous materials — like paint thinner, gasoline, or certain cleaning products — cannot go in checked baggage either. Most household and personal care items are fine. If you are unsure, check the airline's hazmat policy or ask before you pack.

Why the 3-1-1 rule exists

The rule was introduced in 2006 after authorities discovered a plot to bring liquid explosives onto aircraft. The 3.4-ounce limit and the quart-bag requirement were designed to make it harder to assemble a large quantity of liquid in the cabin. The rule has remained unchanged because TSA considers it an effective balance between security and passenger convenience.

TSA has tested faster screening methods — like PreCheck, which lets you keep liquids in your bag during X-ray screening — but these are programs you enroll in separately, not changes to the base rule. The 3-1-1 rule still applies to all passengers at standard security lanes.

Frequently Asked Questions

Can I bring a full water bottle through security?

No. Water is a liquid and must follow the 3-1-1 rule. You can bring an empty water bottle through security and fill it at a fountain or water station after you clear the checkpoint. Many airports have refill stations near gates.

Do I need to remove my liquids bag at every airport?

Yes. At U.S. airports, remove your quart bag and place it in the bin at every security checkpoint. Some international airports have different rules, so check before you travel outside the U.S.

What if my container says 3.4 ounces but looks full?

TSA measures by the container size, not how full it is. A 3.4-ounce container is allowed even if it is completely full. Containers larger than 3.4 ounces are not allowed, even if they are mostly empty.

Can I bring cologne or perfume in my carry-on?

Yes, if the container is 3.4 ounces or smaller and fits in your quart bag. Cologne and perfume are liquids under TSA rules. Full-size bottles go in checked baggage.

Are there any exceptions to the 3-1-1 rule besides baby formula?

Yes. Medications in liquid or gel form, and certain medical devices like inhalers, are allowed in reasonable quantities beyond 3.4 ounces. Tell the officer at security before screening. Duty-free liquids purchased after security can also be brought aboard in a sealed bag, though airline rules vary.