Current TSA Liquid Rules for Carry-On Bags
The Transportation Security Administration enforces the 3-1-1 rule for liquids, gels, creams, and aerosols in carry-on luggage. Each passenger may bring containers of 3.4 ounces or 100 milliliters or less, all fitting into a single quart-sized clear plastic bag. The bag must be placed in a bin for X-ray screening at the checkpoint. TSA officers may require additional screening of liquids that appear cloudy or unidentified. The rule applies to all U.S. airports and to passengers flying under TSA regulations. For the full current rule text, see the official TSA page on liquids and gels TSA Liquids and Gels.
Exceptions to the 3-1-1 rule include medically necessary liquids, baby formula, breast milk, and juice for infants or toddlers. These items are allowed in reasonable quantities beyond the 3.4-ounce limit and do not need to fit in the quart bag. Passengers should declare these items at the checkpoint and keep them separate from other belongings. Ice, ice packs, and gel packs used to cool medically necessary items are also permitted. Frozen items are not subject to the liquid rule if they are completely frozen at the time of screening. For a detailed list of exemptions, see the TSA's medically necessary items page TSA Special Procedures.
Recent Changes and Enforcement Updates
In 2025, TSA continues to enforce the 3-1-1 rule consistently across all U.S. airports, with no new permanent changes to the size or quantity limits. TSA has increased the use of CT scanners at checkpoints, which can detect liquids in sealed containers without requiring removal from bags in some cases. However, officers may still ask travelers to remove quart bags for separate screening. TSA's official guidance states that the core 3-1-1 limits remain unchanged, and the agency has not announced any expansion of the current container size allowance. Travelers should follow the 3-1-1 rule as the standard for carry-on compliance.
TSA has updated its public communication channels to emphasize the 3-1-1 rule in social media posts, app notifications, and airport signage. The agency's website provides a searchable list of prohibited and permitted items, including liquids, with clear size and quantity thresholds. TSA officers may issue warnings or citations for non-compliance, and repeated violations can lead to additional screening or referral for enforcement action. The agency's enforcement approach focuses on education and consistent application of existing rules. For the latest updates, travelers can check the TSA's official news and alerts page TSA News.
Practical Tips for Packing Liquids for Airport Security
Choosing Compliant Containers
Travelers should use travel-sized containers of 3.4 ounces or 100 milliliters or less for all liquid products, including shampoo, lotion, sunscreen, and toothpaste. Containers larger than this limit must be placed in checked baggage, even if the container is not full. TSA officers may confiscate oversized liquid containers at the checkpoint if they cannot be repacked into compliant containers. Passengers should verify container sizes before packing and consider purchasing travel-sized versions of frequently used products. Clear, leak-proof containers help speed up the screening process and reduce the risk of spills during inspection.
Organizing the Quart-Sized Bag
The quart-sized clear plastic bag should be easy to open and close, with each liquid container placed upright to prevent leakage. TSA recommends placing the bag in an accessible location within the carry-on so