Can I fly with a tumbler in my carry-on?

Airline Rules About Stainless Steel Tumblers Or Mugs They say that you can bring a mug in your carry-on if the travel mug or tumbler is empty, doesn't resemble a weapon, and has no sharp edges or features. So yes, you can bring a travel mug on a plane.



Yes, you can absolutely fly with a tumbler (like a Stanley or Yeti) in your carry-on in 2026, but there is one critical rule: it must be empty when you pass through the security checkpoint. The TSA and international security agencies classify any liquid inside the tumbler—even ice—under the "3-1-1" liquids rule. If your tumbler contains more than 3.4oz (100ml) of liquid, it will be confiscated or you will be sent back to empty it. In 2026, with the widespread adoption of high-tech CT scanners, you usually don't even have to take the empty tumbler out of your bag; the machines can see it is empty. Once you are past security, you are free to fill it at a water station or airport cafe. Note that some airlines have strict weight limits for "personal items," so while the tumbler is allowed, a heavy 40oz metal bottle might push your small bag over the 7kg (15lb) limit common on many 2026 budget carriers.

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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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You're allowed to bring thermos cups, Yeti cups, and tumblers on a plane in your hand or checked baggage. The only rule is that when you're going through the screening point, they must be empty if they are packed in your hand luggage.

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Please remember all liquids must be in containers of 100ml or less. If your container is over 100ml it is not allowed through security with any liquid in at all, however, you may take an empty water bottle through security refill it at one of our water fountains or restaurants.

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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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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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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 directive was put in place by the Transportation Security Admistration (TSA) in2006. TSA agents and passengers are expected to followthe3-1-1? rule for liquids. The reason for not allowing liquid is that terrorists could bring liquid explosives or components to make explosive through water bottles.

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The only condition for hydro flasks to be allowed through security is that they must be completely empty of any liquids. That's because all liquids in hand luggage have to follow the 3-1-1 rule and hydro flasks usually are too large to fit in a 1-quart bag, and their volume is above 3.4 oz / 100 ml.

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You can take all plug-in phone chargers with you in your carry-on or checked bags with ease as they do not contain any form of battery and, therefore, do not present any danger. Typically, you will not be able to use this type of charger onboard as most airplanes do not have power sockets.

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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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Why is deodorant not allowed at a airport? 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.

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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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However, if you use a gel based lip balm (like Vaseline), those DO count as liquids and should be placed in your quart sized liquids bag.

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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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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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You can carry your vape or e-cig on a plane. Keep it in the cabin, but no smoking allowed! Learn more from FAA on how to safely pack your vape for air travel. #VapesOnAPlane #PackSafe www.faa.gov/go/packsafe.

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