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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Can you take a thermos through TSA?

You may take empty drink containers through the checkpoint and fill them afterward. For more prohibited items, please go to the 'What Can I Bring?' page.
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Can I take a metal flask on a plane?

Yes, you can bring your reusable stainless steel water bottle with you on an airplane. Nowhere on the TSA website does it specify certain water bottle materials that cannot board the plane. As long as your stainless steel bottle was empty when it went through the security checkpoint, you should be good to go.
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Can I bring my water flask on a plane?

As part of your carry-on luggage, you are allowed to take your reusable bottle through the security checkpoints with you as long as it is empty. The only way to carry liquids that you had before going through security is to include them in your check bag and there need to be smaller than 100ml.
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Can I take a flask in hand luggage?

The main rule to remember is that you must not take any more than 100ml of a restricted liquid into the cabin of a plane, and those liquids should be placed into individual 100ml containers. Any liquid that you need more than 100ml of should be packed in your hold luggage.
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Can You Bring An Hydro Flask On An Airplane

Can I bring my stainless steel water bottle on a plane?

Yes, you can take a stainless steel water bottle on an airplane. The TSA has no problem with travelers bringing stainless steel water bottles through airport security. The water bottle should be empty and placed in your carry-on bag when you go through the security checkpoint.
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What items Cannot go in hand luggage?

Items that you can have in your hold baggage but not in your hand baggage include:
  • Liquids, creams, gels and pastes in containers over 100ml.
  • Sharp items including scissors.
  • Razor blades (razors that have the blade set into a plastic moulding are allowed in hand baggage, but other types are not)
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Why is water not allowed on planes?

The directive was put in place by the Transportation Security Admistration (TSA) in2006. TSA agents and passengers are expected to followthe"3-1-1″ 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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Does TSA check water bottles?

Yes, the size of a water bottle does matter when it comes to what can go through security. Most airlines let people bring an empty water bottle with a capacity of up to 20 oz. or a container that is 34 oz. or smaller. Containers bigger than this may not be allowed through TSA.
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Can you bring a razor on a plane?

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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Can you bring a small flask on an airplane?

You are limited to containers of 3.4oz or less that fit in your quart-sized bag. For checked bags you are limited to five liters per passenger. However, it must be in unopened retail packaging!
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Can I bring an empty Yeti thermos on a plane?

Fortunately, Yeti cups are allowed on airplanes, both as a carry-on and in checked baggage. The only requirement is that they are empty when you pass through the security checkpoint.
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Can I wear stainless steel through TSA?

It's definitely possible to get through airport security metal detectors without setting off the alarm if you have gold, silver, platinum, etc. Even steel and titanium jewelry objects can get through okay.
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Does stainless steel go off in TSA?

Stainless steel has very low electrical conductivity and low magnetic properties. So airport metal detectors usually don't detect stainless steel easily. That said, some metal detectors will have the capacity to detect stainless steel if their sensors are configured correctly.
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Can you bring unopened snacks through TSA?

Solid food items (not liquids or gels) can be transported in either your carry-on or checked bags. Liquid or gel food items larger than 3.4 oz are not allowed in carry-on bags and should be placed in your checked bags if possible.
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Can I bring ibuprofen on a plane?

You can bring your medication in pill or solid form in unlimited amounts as long as it is screened. You can travel with your medication in both carry-on and checked baggage. It's highly recommended you place these items in your carry-on in the event that you need immediate access.
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Does TSA allow stick deodorant?

For example, classic stick deodorant doesn't have any limitations, so you're free to pack whatever size you want. Liquids and semi-liquids, on the other hand, are subject to restrictions. This includes many of the popular alternatives to stick deodorant: Roll-On Deodorants and Antiperspirants.
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Why is peanut butter not allowed on planes?

The TSA has spoken: In March, the airport-security agency nearly broke the internet when it declared that it considers peanut butter to be a liquid and therefore subject to the 3.4-ounce limit for carry-on bags. Its reasoning: “A liquid has no definite shape and takes a shape dictated by its container.”
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Is bottled water free on airplanes?

While some airlines do provide free water and soft drinks, others — like Spirit and Eurowings — charge for bottled water. In the US, planes are required to provide food and water for all passengers only if there is a significant flight delay on the tarmac; otherwise, complimentary water is not a requirement.
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Can I take bottled water on a plane?

If containers are larger than 3.4 ounces (100 ml), they won't be allowed through security, and the security officer will discard them. However, you can bring an empty reusable water bottle of any size through security and fill it up after you've gone through the checkpoint.
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Can you take phone chargers in hand luggage?

Do not pack you portable charger (power pack) in hold luggage: Taking your portable phone charger (power pack) on a plane is fine, but just remember to pack it in your hand luggage. Do not put them in your hold luggage as this is not permitted and could result in your luggage not being loaded.
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Does medication have to go in clear bag?

Liquid medications

If your liquid medicines come in a container of 100ml or less, your medicine will need to go into a 20 x 20cm resealable plastic bag, along with all of the other liquids you are planning to take with you in your hand luggage.
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What is banned from hand luggage on a plane?

Aerosol cans (except limited quantities of personal care items that are 3.4 ounces or less), butane, fuels, gasoline, gas torches, lighter fluid, strike-anywhere matches, flammable paints, turpentine, paint thinner, arc lighters, plasma lighters, electronic lighters, E-lighters, and replicas of incendiaries cannot be ...
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Can I take snacks on a plane?

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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What is the 3 1 1 rule?

In short, the 3-1-1 rule is: Each liquid you bring through the TSA checkpoint must be in a 3.4-ounce or smaller container ("3"), all containers must be placed inside one clear quart-size plastic bag ("1") and each passenger is only allowed one plastic bag ("1").
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