Can You Bring A Hydro Flask On A Plane? (through TSA)

credit: Yay

Not much comes close to having fresh and cool water when traveling. Drinks are not typically allowed through airport security, but since a hydro flask is meant to retain the temperature, it makes one question, can you bring a hydro flask on a plane?

A hydro flask is allowed on a plane if it is empty or filled with a drink after passing airport security. If the hydro flask has a beverage inside, TSA will not allow it since only liquids that are 3.4 and 100ml or less are permitted. A filled hydro flask will be allowed on a plane once security control has been passed.

Can You Carry A Hydro Flask On A Plane?

The TSA allows passengers to carry a hydro flask on the plane. Passengers can pack hydro flasks in checked luggage or carry-on bags. If passengers take a hydro flask when traveling, they must follow the guidelines set out by the TSA.

If you pack a hydro flask in your checked luggage, you can pack more than one, and there will be no problem if there is liquid inside. If you carry a hydro flask in your carry-on bag, backpack, or purse, you must ensure that it is empty when you reach security checkpoints.

Can You Take A Hydro Flask Through Airport Security?

Hydro flasks are allowed in carry-on bags and purses through airport security, but they must be empty. The TSA has a rule that no liquids are allowed unless it equal to or are less than 3.4 oz or 100ml.

Since the amount can’t be measured at security, passengers are asked to drink any remaining liquid inside the flask. If the flask is full and you cannot empty it, security will confiscate it.

If you want to take your hydro flask on the plane and avoid confiscation, always ensure that it is empty, regardless if it is inside your carry-on or purse. The screening picks up liquids above the size restriction, so there is no way you can get away with it.

Can You Fill Your Hydro Flask At The Airport?

Once you have passed the airport security checkpoints safely, there are water stations in the airport where you can fill up your hydro flasks. If you don’t want to fill it at one of the taps, you can purchase bottled water at one of the stores and pour it into your flask.

Many people follow the technique to avoid using plastic bottles. It also helps to have a reusable bottle on the plane because the complementary cups can spill. The Hydro flask also provides the benefit of retaining your water temperature.

When heading towards the boarding gate, check the water stations to fill your hydro flask. Most airports have them available, and if they don’t, you have the option of buying water.

Can You Fill Your Hydro Flask On The Plane?

If you don’t want to fill your hydro flask at the airport, you are running late and don’t have the time to stop, or the airport does not have a water station, you can wait till you get on the plane to fill your flask.

Most airlines provide complimentary sealed water cups. Do your research before traveling to check if the airline you will be flying with does or if you will have to pay. Once you are on the plane, you may request some water cups from a flight attendant.

You can specifically request a few, showing the flight attendant your empty hydro flask and mention that you would like to fill it up to sip on through the flight. They will kindly give you as many as you need. If you run out, don’t hesitate to request more.

What Size Hydro Flask Can You Take On A Plane?

If you want to carry a hydro flask on your next flight, you probably wonder if there is a size limitation. Most airlines do not have any size rules for bringing a hydro flask. There is no problem if it is in your checked luggage, even if it is full of liquid.

If you want to carry a hydro flask in your carry-on, purse, or backpack, it doesn’t matter what size it is, but it does need to be empty. Airport security will check if there is any liquid in the flask. If not, they will allow you to go through without issues.

Can A Hydro Flask Explode On A Plane?

With the high altitude in a flight, you might be concerned about your hydro flask exploding on the plane, but despite the changes in pressure, your hydro flask will not explode.

You should, however, open it gently to slowly release pressure build-up, especially if you filled the flask before getting on the plane.

If your flask has a straw or flip-up mouthpiece, be sure to first gently twist the lid for pressure release before flipping the mouthpiece open to prevent water from shooting everywhere and on other passengers.

Do Domestic And International Flights Allow Hydro Flasks?

It doesn’t matter where you fly or whether you fly nationally or internationally; according to the TSA guidelines, all airlines should allow empty hydro flasks on planes. If the flask is empty, you can take it in your hand luggage or personal handbags.

If you want to carry a hydro flask with liquid inside, you must pack it into your checked luggage. Always check your airline’s specific regulations before flying to confirm any information and limitations on items allowed.

Can You Fill Your Hydro Flask With 3.4 Oz Of Water?

There is a misconception that because 3.4 oz or 100 ml of liquid is allowed to pass through security checks, passengers can fill that amount of water in their hydro flasks and take it through screening without issues.

That concept does not work as it doesn’t matter how much water or other liquid is inside the flask; what matters is the size of the hydro flask. If your hydro flask is larger than 3.4 or 100 ml, it will be confiscated if there is liquid.

The only way your hydro flask can pass through airport security screening is if it is empty or the total size of the vessel does not exceed the TSA guidelines.