Can You Bring A Hydro Flask On A Plane?

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Last Updated on September 6, 2022

Key Takeaways

  • According to the TSA, hydroflasks with liquid inside are not allowed to go through airport security in carry-on luggage
  • Empty hydro flasks are permitted in carry-on bags
  • You can pack a filled hydro flask containing liquid in checked luggage
  • There have been a few incidences where even empty hydro flasks have not been permitted through airport security

TSA Hydroflask Rules

The Transportation Security Administration check all hand luggage at the airport security checkpoint.

They are mainly looking for liquids (why?) and weapons.

They don’t mention any specific rules about flying with a Hydro Flask since it’s a brand name.

Here is the relevant rule:

As far as the TSA is concerned a Hydro Flask is just a water bottle.

The main point thing to remember is that a Hydro Flask must be empty when going through the airport security checkpoint.

You are permitted to fill up your Hydro Flask after you have cleared security.

The material that your hydroflask is made from doesn’t matter. So even a stainless steel hydro flask is permitted in hand luggage.

If your Hydro Flask is empty then the TSA liquids rule won’t be a problem.

The only other reason that an empty water bottle might not be allowed through security is if the TSA agent felt it might be able to be used as a weapon.

Many passengers have asked the TSA on Twitter if they can pack a hydro flasks in carry-on bags:

The answer is always the same. Empty water bottles are good to go in carry-on bags and checked bags.

But there have a been a couple of reports of hydro flasks being confiscated at airport security.

Raul wasn’t happy that the TSA agent made him throw away an empty hydro flask:

And Sara also had to abandon her flask at the security checkpoint:

There is no size limit to the size of empty flask that you are allowed to bring on a plane.

No matter what the rules or the social media team say the final decision rests with the TSA agent that inspects your luggage.

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