Why does TSA have the 3-1-1 rule?

The TSA initially banned liquids and gels from carry-on bags in 2006 when British authorities reportedly thwarted a plot to blow up planes bound for the United States with liquid explosives. The rule was later revised to allow small quantities of liquids in carry-ons.



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Back here in the U.S., though, 3-1-1 remains the prevailing order, for the foreseeable future, when it comes to liquids, gels, aerosols, creams, and pastes. And those rules remain: No single bottles of more than 3.4 ounces, all bottles in one clear plastic bag, with no more than one such bag per passenger.

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Sep. 2006. A month after the implementation of the original liquids ban, TSA amends its rules governing liquids in passenger carry-on baggage and allows airline passengers to carry liquids, gels and aerosols in containers of only 3.4 ounces or less in a single, clear, resealable 1-quart plastic bag.

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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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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 policy continues to be enforced, says the TSA's Lauren Gaches. Although it is important to note that we empower our workforce with discretion. However, extensive interviews with air travelers suggest that the policy is largely unenforced.

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Why was the 100ml liquids rule originally brought in? Liquids in quantities larger than 100ml have been verboten on commercial air travel since 2006 – and like so many flight regulations introduced in the decade following 9/11, it was originally an anti-terrorism measure.

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Pack items that are in containers larger than 3.4 ounces or 100 milliliters in checked baggage. Any liquid, aerosol, gel, cream or paste that alarms during screening will require additional screening.

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If you want to take perfume on a plane, you need to keep in mind that perfume is considered a liquid and is subject to TSA regulations. The perfume must be in a container that holds no more than 3.4 ounces (100 millilitres), and it should be placed in a clear, plastic, quart-sized bag for screening.

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Is Mascara Considered a Liquid by TSA? TSA counts mascara as a liquid, so the 3-1-1 rule for packing it in hand luggage applies. It states that all liquids have to be in 3.4 oz (100 ml) bottles or smaller and packed in a 1-quart bag. Mascara usually isn't above 3.4 oz, so you're free to pack it in your hand luggage.

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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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As long as you keep your liquid or aerosol deodorant in a container that is smaller than 3.4 ounces (100ml) and store it in a quart-sized, zip-top bag, you shouldn't have a problem traveling with it. There are no restrictions for packing solid deodorants in your carry-on luggage.

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There are no TSA restrictions on Chapstick. Even though it smears and spreads onto the lips, Chapstick is not considered a liquid by the TSA. You can just toss your chapstick in your carryon bag or checked luggage.

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According to the TSA, to carry sunscreen inside your cabin bags, it needs to be less than or equal to 100 ml/3.4 oz in volume. It is the same for any other liquid toiletries, such as perfumes and deodorant. This is known as the LAGs (Liquids, Aerosols and Gels) regulation, which was introduced by the TSA.

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Because the TSA considers the nut spread a liquid, plane passengers must limit the amount they bring in their carry-ons. Like all other liquids, passengers are limited to 3.4 oz or less of peanut butter in their carry-on bag, but can also put the snack in their checked baggage.

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The TSA initially banned liquids and gels from carry-on bags in 2006 when British authorities reportedly thwarted a plot to blow up planes bound for the United States with liquid explosives. The rule was later revised to allow small quantities of liquids in carry-ons.

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