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What is the 3-1-1 carry-on rule?

You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes through the checkpoint. These are limited to 3.4 ounces (100 milliliters) or less per item. This is also known as the 3-1-1 liquids rule.



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In the U.S., trials have been ongoing, but the 3-1-1 liquid rule remains in place. Only those with TSA Pre-Check can pass through security while keeping their liquids and electronics in their bag and belts.

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Toothpaste is considered a liquid by the TSA (Transport Security Agency), even though it's technically a paste. In fact, all pastes, gels, waxes, and lotions are also classified as liquids. And even today, these substances are still restricted by the 3-1-1 rule in hand luggage due to safety threats.

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If you want to bring perfume in your hand luggage, you must comply with the “3-1-1 Rule”. This means that it must be in a container with 3.4 ounces (100 millilitres) or less and placed in a single, clear, plastic, sealable bag for inspection.

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The regulation which allows only 100 ml liquids, gels, and aerosols to be carried inside the plane was introduced in 2006, after the British Police uncovered a terrorist plot to ignite liquid explosives that were carried on board seven airliners travelling from the UK to the United States and Canada.

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The TSA prohibits containers with more than 3.4 ounces of liquid in carry-on luggage, so if you have a liquid or semi-liquid antiperspirant, be sure to check the quantity on the container. For example, many stick deodorants and antiperspirants come in sizes under 3.4 ounces, so it's fine to bring in your carry-on bag.

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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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You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes through the checkpoint. These are limited to 3.4 ounces (100 milliliters) or less per item. This is also known as the 3-1-1 liquids rule.

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The TSA rules allow for lipstick to be considered a solid, not a liquid or gel, which means that you do not have to take it out of your carry-on during the security check.

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How many ml of perfume can I take on a plane? The maximum amount of liquid that can be carried on board an aircraft in hand luggage must not exceed 100 ml per item. In other words, you can carry more than one item in different containers, but each of these containers must have a maximum capacity of 100 ml separately.

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In hand luggage, whether it's your personal item or carry-on, you can carry perfume only in up to 3.4 oz (100 ml) bottles or smaller. In checked luggage, perfume bottles can't be over 500 ml (17 fl oz) or 500 g (18 oz).

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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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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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Key Takeaways: You can carry sunscreen in your cabin bags. You will need to limit the volume to equal or less than 100 ml and place them inside a resealable plastic bag. In case travel-friendly containers do not offer you enough sunscreen, it is fine to bring large amounts if you pack them inside your hold luggage.

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Nail clippers are also allowed on planes, according to the Transportation Security Administration (TSA). You can pack them in both your carry-on and checked luggage. Similar to tweezers, it's a good idea to wrap your nail clippers or place them securely in a bag to avoid injury to others handling your luggage.

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