The TSA 3-1-1 policy governs how passengers may carry liquids, gels, and aerosols through airport security checkpoints in the United States. Under the rule, each liquid container must hold 3.4 ounces (100 milliliters) or less, all containers must fit into 1 clear, quart-sized resealable bag, and each traveler is limited to 1 such bag. As of 2026, TSA has updated several aspects of its screening procedures — here is everything you need to know before your next flight.
What Is the TSA 3-1-1 Policy?
The TSA 3-1-1 policy is a liquid carry-on rule that applies to all passengers at U.S. airport security checkpoints. Each traveler may bring liquids, gels, creams, and aerosols in containers of no more than 3.4 oz (100 ml) each, packed into a single, transparent, quart-sized zip-top bag. This bag must be removed from your carry-on luggage and placed separately in a screening bin.
The rule applies to items such as:
- Shampoo, conditioner, and body wash
- Toothpaste and mouthwash
- Perfume and cologne
- Sunscreen and lotions
- Liquid makeup (foundation, mascara, etc.)
- Aerosol sprays (within the size limit)
What’s New in TSA’s 2026 Security Rules?
TSA’s 2026 updates reflect continued investments in advanced imaging technology and AI-assisted screening at major U.S. airports. Key changes include:
- CT Scanner Expansion: At airports equipped with Computed Tomography (CT) scanners, passengers may no longer need to remove their quart-sized liquids bag from their carry-on for X-ray screening. TSA is actively expanding CT scanner deployment across additional airports — check with your departure airport ahead of time.
- Stricter Enforcement of Container Limits: TSA officers are applying heightened scrutiny to oversized containers, even if they are only partially full. A 10 oz bottle of shampoo that is three-quarters empty is still non-compliant and may be confiscated.
- Enhanced Screening for Powders: Powders over 12 oz (350 ml) — including protein powders, baby powder, and coffee — must be placed in a separate bin for additional screening.
- Medically Necessary Liquids: Medications, baby formula, and breast milk continue to be exempt from the 3.4 oz limit. Declare these items to a TSA officer at the checkpoint.
How to Pack Liquids for TSA Compliance
Following the TSA 3-1-1 policy correctly can save you significant time at the checkpoint. Here is a step-by-step guide:
- Gather all liquid, gel, and aerosol items you plan to carry on board.
- Check container sizes — each must be 3.4 oz (100 ml) or smaller. Do not rely on how full the container is; the labeled capacity is what counts.
- Place all compliant containers into one clear, quart-sized zip-top bag. All items must fit comfortably with the bag fully sealed.
- Limit yourself to one bag per person. Children are each entitled to their own separate bag.
- Pack the bag where it is easily accessible in your carry-on so you can remove it quickly at security.
- Declare medically necessary liquids to a TSA officer before screening begins.
What Liquids Are Exempt from the TSA 3-1-1 Policy?
Certain liquids are exempt from the standard 3-1-1 carry-on restrictions. These must be declared to TSA at the checkpoint and may be subject to additional screening.
- Prescription and over-the-counter medications in liquid form
- Breast milk and baby formula (in reasonable quantities for the duration of travel)
- Liquid nutrition for medical conditions
- Ice packs and gel packs needed to keep medical items cool
These exempt items do not need to fit into your quart-sized bag but should be separated from other carry-on contents for ease of inspection.
TSA PreCheck and the 3-1-1 Policy
TSA PreCheck members are not exempt from the 3-1-1 liquids policy. Even with PreCheck status, passengers must comply with all liquid container size and packaging requirements. However, PreCheck lanes typically move faster, which reduces the overall impact of the bag-removal step at airports without CT scanners.
Frequently Asked Questions
Q: Does the TSA 3-1-1 policy apply to international flights departing from the U.S.?
Yes. The 3-1-1 policy applies to all flights departing from U.S. airports, regardless of the destination. However, other countries may have different liquid rules, so check the policies of your arrival airport when returning home.
Q: Can I bring a full-size bottle of liquid in my carry-on if the bottle holds exactly 3.4 oz?
Yes, provided the container’s labeled capacity is 3.4 oz (100 ml) or less and it fits within your quart-sized bag along with your other liquids.
Q: What happens if I arrive at TSA screening with a non-compliant liquid?
TSA officers will ask you to either surrender the item, return it to your checked baggage if time permits, or mail it home. Non-compliant items cannot pass through the security checkpoint.
Q: Are alcohol beverages subject to the 3-1-1 policy?
Yes. Alcoholic beverages in carry-on bags must comply with the 3.4 oz limit. Alcohol between 24% and 70% ABV is permitted in checked baggage in quantities up to 5 liters per passenger.
Q: Is solid sunscreen or solid deodorant subject to the 3-1-1 rule?
No. Solid forms of sunscreen, deodorant, and similar personal care products are not considered liquids or gels under the TSA 3-1-1 policy and do not need to go into your quart-sized bag.
