What is the 3 3 3 1 rule?

The 3-1-1 Rule refers to three core components that govern how many liquids you can bring in your carry-on bags: Each liquid must be in a 3.4-ounce or less container (3), all containers must be placed inside one clear quart-sized plastic bag (1), and each passenger is only allowed one plastic bag (1).



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Is toothpaste considered a liquid by the TSA? Yes, toothpaste must adhere to the 3-1-1 rule for liquids and gels. Toothpaste can be brought through TSA security in your carry-on as long as it is 3.4 ounces (100 milliliters) or less and placed in a 1-quart bag.

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The TSA's liquid limit for carry-ons—known as the 3-1-1 rule—allows travelers to pack liquids, aerosols, gels, creams, and pastes under 3.4 ounces (100 milliliters) in their carry-on bags. Passengers are allowed up to one quart-sized bag per person, or roughly nine 3.4-ounce containers in a single quart-sized bag.

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It's called the 3-1-1 rule because your liquids must be no more than 3.4 ounces (that's the 3), they have to fit into 1-quart bags (there's the 1) and you're only allowed one (that's the final 1) of the bags.

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But what are they, and is deodorant considered a liquid when flying? Deodorant can be considered a liquid when flying if it is in a gel or aerosol form. If your deodorant is solid, though, the TSA will let you bring a standard stick of solid deodorant with you in your carry-on luggage.

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You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes in your carry-on bag and through the checkpoint. These are limited to travel-sized containers that are 3.4 ounces (100 milliliters) or less per item.

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Safety Razors: Because the razor blades are so easy to remove, safety razors are not permitted in your carry-on luggage with the blade. They're fine to pack in your carry-on without the blade. The blades must be stored in your checked luggage. The same applies for straight razors.

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Firearms, ammunition, and fireworks are prohibited, as are all knives and safety razors (including pocket knives and Swiss Army knives). Straight razors and replacement blades for straight razors are also not allowed. Most tools also cannot be packed in carry-on luggage, as they have the potential to cause harm.

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As stated in the TSA liquid regulation, it is the size of the container that counts, not the actual contents. A 125 ml tube of toothpaste that has been half used up is not permitted, but a full 100 ml tube is.

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Stick deodorant is fine in any size. Well, almost any size… Powders and crystals are good to go as well. Spray, Gel, Liquid, Cream, Pastes, and Roll-On deodorants need to be in containers no larger than 3.4 ounces and placed in a clear quart-sized baggie.

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London City Airport has scrapped the 100ml liquid limit by using high-tech scanners which also allow electronics to be kept in hand luggage at security.

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Generally speaking, you are allowed to take as much as you need with you in your hand luggage. There is no limit to how many paracetamol tablets you can take with you, whether it is prescribed or not. Of course, this may vary between different airlines.

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The Bottom Line. Chapstick, lipstick, and solid lip balms are not considered liquids by the TSA and can be thrown into your handbag or carry-on without any issues. Liquid lip gloss, jars of petroleum lip balm, and other lip care liquids must be placed in your clear liquids bag for security checkpoint screening.

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TSA considers tweezers to be completely safe, so they're allowed on planes. You can pack tweezers in hand or checked baggage without any packing restrictions. But TSA doesn't allow packing sharp objects in hand baggage because some of them could be used as potential weapons.

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Solid food items (not liquids or gels) can be transported in either your carry-on or checked baggage. TSA officers may instruct travelers to separate items from carry-on bags such as foods, powders, and any materials that can clutter bags and obstruct clear images on the X-ray machine.

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