Carry-on bags
Yes
Checked luggage
Yes
Rules for Flights in the USA
In the United States, empty metal water bottles are allowed in hand and checked baggage. TSA doesn’t establish a size, material, or weight restriction for water bottles, so you’re allowed to travel with aluminum, stainless steel, and other water bottles.
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.
Rules for Flights in Other Countries
Canada, Europe, and New Zealand
On Canadian, European, and New Zealand flights, empty metal water bottles are allowed in hand and cargo baggage.
The United Kingdom, China, and India
On the United Kingdom, Chinese and Indian flights, metal water bottles aren’t mentioned specifically as allowed or banned from airplanes. But generally, they are permitted in hand and cargo baggage as long as they don’t contain any liquids.
Australia
In Australia, empty metal water bottles are allowed in cabin and cargo luggage. On domestic flights, it’s also allowed to bring water bottles containing water or other liquids, as there aren’t any liquid restrictions for cabin baggage.
Sources: For writing this article, we took information only from official sources, like airline regulators, government websites, and major airlines. If you want to confirm that our information is accurate and up to date, click on any of the links mentioned above. We linked out to where we found this information for each country.
Disclaimer: The final decision of whether you can bring metal water bottles on planes always rests on the security officer. Some airlines also have additional rules that may be different.
Frequently Asked Questions About Bringing Metal Hydro Flasks on Planes
Can I take a hydro flask with frozen water through security?
In addition, freezing a hydro flask is not recommended, as it might damage the bottle’s seal and crack the insulated walls. Although it’s theoretically possible to travel with a frozen hydro flask, it’s not recommended. Instead, do it with a disposable water bottle, which you aren’t afraid to throw out if asked to.[/optinlocker]
Do I need to take out hydro flasks when going through security?
However, your hydro flask must be completely empty. When you’re going through security, if the hydro flask has any liquid in it -even if the bottle isn’t entirely full, the security guards will take it out of your bag and ask you to dispose of it.[/optinlocker]
Does my hydro flask need to be completely empty when going through security?
Is it better to pack metal water bottles in hand or checked luggage?
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