TSA Liquids Rule and the 3-1-1 Standard
The Transportation Security Administration enforces a liquids restriction for carry on baggage under the 3-1-1 rule. Each passenger may bring containers of liquid, gel, aerosol, cream, or paste that hold 3.4 ounces or 100 milliliters or less per item. All compliant containers must fit inside a single clear, quart-sized, resealable plastic bag measuring roughly 20 centimeters by 20 centimeters. One bag per passenger is allowed, and the bag must be placed in a separate bin for X-ray screening at the checkpoint. This rule applies to all U.S. domestic flights and most international flights departing from or arriving in the United States, and it is designed to balance security with passenger convenience TSA liquids rules.
Exceptions to the 3-1-1 rule include medically necessary liquids, baby formula, breast milk, juice for infants, and liquids needed for passengers with disabilities or medical conditions. These items may exceed the 3.4-ounce limit and do not need to fit inside the quart bag, but travelers should declare them to TSA officers at the beginning of the screening process. Medications and liquid medical items may be subject to additional screening, including visual inspection or testing, and TSA officers may ask for documentation or proof of purpose. Duty-free liquids purchased in the secure area of the airport, sealed in a tamper-evident bag with a receipt, are also exempt from the 3-1-1 restriction if the purchase was made at a licensed retailer TSA liquids exceptions.
Liquids, Gels, Aerosols, and Items That Count
What Counts as a Liquid Under TSA
TSA defines liquids broadly to include standard liquids, gels, aerosols, creams, pastes, and similar substances. Common items such as shampoo, conditioner, lotion, sunscreen, toothpaste, mouthwash, hair gel, shaving cream, and liquid makeup must follow the 3.4-ounce container limit and the quart bag rule. Sprays, including aerosol deodorants, hairsprays, and sunscreen sprays, are treated as liquids or aerosols and are subject to the same size and container restrictions. Items in any state between solid and liquid, such as peanut butter, jam, honey, yogurt, pudding, and liquid food supplements, also fall under the liquids rule and must comply with the size and bag requirements TSA liquids list.
Items that are solid and do not have a liquid or gel-like consistency, such as bar soap, solid deodorant, stick lipstick, solid perfume, and dry shampoo, are generally not subject to the liquids rule and can be packed in any quantity in carry on bags. Powders, tablets, and dry items also remain unrestricted in carry on luggage, but TSA may require additional screening for certain powders in quantities over 12 ounces. Travelers should place loose powders and similar items in a separate bin for screening to reduce delays. TSA officers may also request that passengers open containers or provide samples for testing if the contents are unclear or if an item appears to be a liquid but is not clearly labeled TSA screening procedures.
Packing Liquids for Carry Ons and Common Mistakes
Best Practices for Packing Liquids
Travelers should use travel-sized containers that are clearly labeled and leak-proof, and they should place all liquid containers inside