The TSA liquid rule has not fundamentally changed, but enforcement and interpretation have shifted in recent years

The core rule remains the same: you can bring liquids, gels, and aerosols through airport security in containers of 3.4 ounces (100 milliliters) or smaller, packed in a single clear quart-sized bag. One bag per person. This is called the 3-1-1 rule and has been in place since 2006.

What has changed is how strictly TSA officers enforce it at individual airports, which items they classify as liquids, and what counts as a "gel" or "aerosol." These shifts happen without formal announcements, which is why many travelers think the rule itself changed when really the process of it did.

Key Takeaways

  • The 3-1-1 rule (3.4 ounces per container, 1 quart-sized bag, 1 bag per person) has not changed since 2006.
  • TSA classification of what counts as a liquid, gel, or aerosol varies by officer and airport, which creates confusion about whether the rule changed.
  • Peanut butter, yogurt, honey, and similar spreadable items are classified as liquids and must follow the 3.4-ounce limit.
  • TSA PreCheck and CLEAR members still follow the same liquid limits; these programs do not exempt you from the rule.
  • The fastest way to know if a specific item is allowed is to check the TSA website's "What Can I Bring?" tool or ask at the checkpoint before you pack.

What the 3-1-1 rule actually requires

You can bring one clear, quart-sized plastic bag containing liquids, gels, and aerosols. Each individual container inside that bag must be 3.4 ounces (100 milliliters) or smaller. You are allowed one bag per person, and it must fit in the security bin without being squeezed.

Common items that count as liquids include shampoo, conditioner, lotion, toothpaste, deodorant, sunscreen, perfume, and makeup. Gels include hair gel, aloe vera gel, and peanut butter. Aerosols include spray deodorant, hairspray, and shaving cream. If you are unsure whether something is a liquid, the safest assumption is that it is.

You can bring an unlimited number of solid items — a bar of soap, a stick of deodorant, a solid perfume, or a powder (in reasonable quantities). You can also bring a full-sized container of any liquid in your checked baggage, as long as it meets airline rules for hazardous materials.

Why people think the rule changed

TSA officers at different airports sometimes enforce the rule differently. One officer might allow a 3.5-ounce container if it is close enough; another will reject it. One airport's security line might be strict about the quart-sized bag requirement; another might not check. These inconsistencies happen because TSA does not issue daily enforcement bulletins, and officers use judgment calls.

In 2023 and 2024, some airports began testing advanced screening technology that can detect liquids without removing them from your bag. This led to rumors that the liquid rule was being eliminated, but the rule itself did not change — only the screening method at a few airports was being tested. Most airports still require you to remove your liquids bag.

TSA also periodically updates its "What Can I Bring?" tool, which classifies specific brand-name items. When a product you thought was solid gets reclassified as a gel or liquid, it can feel like the rule changed when really the classification did.

Items that confuse travelers most often

Peanut butter, almond butter, and other nut butters are classified as liquids or gels, not solids. You must pack them in containers of 3.4 ounces or smaller and include them in your quart-sized bag. The same applies to honey, jam, Nutella, and yogurt.

Solid deodorant and solid perfume can go in your carry-on without the liquid bag. Spray deodorant and liquid perfume must follow the 3-1-1 rule. Toothpaste is classified as a gel and must be in a container of 3.4 ounces or smaller.

Medications in liquid or gel form (like liquid ibuprofen or antibiotic ointment) are allowed in reasonable quantities beyond the 3.4-ounce limit, but you should declare them and keep them separate from your liquids bag. Powdered medications do not count as liquids.

TSA PreCheck and CLEAR do not change the liquid rule

If you have TSA PreCheck, you still follow the 3-1-1 rule. TSA PreCheck speeds up screening by allowing you to keep shoes, belts, and light jackets on, and to leave your liquids bag in your carry-on. You do not remove it from your bag — the officer screens it while it is packed. But the rule itself does not change: one quart-sized bag, 3.4 ounces per container.

CLEAR, which uses biometric scanning to skip the ID-check line, also does not exempt you from the liquid rule. You still go through the same X-ray and metal detector screening, and the same liquid limits explore.

How to pack liquids correctly

Buy a clear quart-sized freezer bag (the kind used for food storage) or a TSA-approved liquids bag, which you can find at most drugstores and travel retailers. Place all your liquid, gel, and aerosol containers inside it. Make sure each container is 3.4 ounces or smaller — check the label, not the amount you have filled it with. Seal the bag completely.

Place the sealed bag in an straightforward-to-reach spot in your carry-on, or pack it as the first item you place in your carry-on so you can remove it quickly at security. At the checkpoint, remove the bag and place it in the security bin by itself, separate from your carry-on bag.

If you are traveling with multiple people, each person gets one bag. A family of four can bring four quart-sized bags, but each person's bag must contain only their own items.

What to do if an officer rejects an item

If a TSA officer says an item violates the liquid rule and you disagree, ask to speak to a supervisor. Bring the item's label or packaging with you. If the supervisor agrees with the officer, you have three options: leave the item at the checkpoint, pack it in your checked baggage (if the airline allows it), or go back to your car or hotel and return to security.

If you want to know in advance whether a specific item is allowed, use the TSA website's "What Can I Bring?" tool. You can search by brand name or product type. If the tool does not list your item, you can submit a question and TSA will respond within a few days.

Frequently Asked Questions

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

Yes. Liquids in checked baggage do not follow the 3-1-1 rule. You can bring full-sized bottles of shampoo, lotion, perfume, and other liquids in your checked bag, as long as they are not classified as hazardous materials (like certain aerosols or flammable items). Check your airline's baggage rules, as some airlines have their own restrictions.

Do I need to remove my liquids bag if I have TSA PreCheck?

No. With TSA PreCheck, you can leave your liquids bag in your carry-on and go through the expedited screening lane. The officer will screen it while it is packed. You still cannot bring containers larger than 3.4 ounces or more than one quart-sized bag.

Is toothpaste considered a liquid?

Yes, toothpaste is classified as a gel. You must pack it in a container of 3.4 ounces or smaller and include it in your quart-sized liquids bag. A standard travel-size tube of toothpaste (usually 0.85 to 1.5 ounces) fits the rule.

Can I bring an empty water bottle through security?

Yes. An empty water bottle is not a liquid and can go through security in your carry-on. Once you pass the checkpoint, you can fill it at a water fountain or refill station. Many airports have dedicated refill stations near gates.

What if my deodorant is a gel stick instead of a spray?

Gel stick deodorant is classified as a gel and must follow the 3-1-1 rule. Solid stick deodorant (the kind that does not feel wet or slimy) can go in your carry-on without the liquids bag. If you are unsure, check the product label or use the TSA "What Can I Bring?" tool.