On some flights they may give you a cup or a small water bottle, but what if you want to bring your water bottle on a plane?
The short answer is.
Yes, you can take water bottles on a plane, but large bottles must be empty when going through the security checkpoints. Liquids are limited to bottles of 3.4 fl oz / 100 ml in carry-on bags. You can bring an empty reusable water bottle through security and refill it for free at airport water stations or ask flight attendants to fill it.
This post will cover everything you need to know about traveling with both filled and empty water bottles on planes, on domestic and international flights.
Let’s dive right in.
TL;DR
You can bring a water bottle on a plane.
Small bottles that are 3.4 oz / 100 ml or less are allowed through airport security, but larger bottles must be empty when going through the checkpoint.
After you pass security, you can refill your bottle at airport water stations, fountains, or ask a flight attendant to fill it during the flight.
You can also pack both empty and full water bottles in checked luggage without any restrictions.
The same general liquid rules apply on most domestic and international flights.
Can I Take Water Bottles Through Airport Security?
Accruing to The TSA you can bring a bottled water through the security checkpoint, but any bottle must be 3.4 ounces / 100 ml or less and placed in a single quart-sized.
So whether it is distilled or spring water The TSA 3-1-1 liquid rule is non-negotiable.
The only exception that the TSA has is when a passenger is traveling with a child (for baby formula).
In this case, you can bring a full size filled bottle of water along with other baby food and equipment, but in reasonable quantities.
So if you are not traveling with a baby, you will need to empty your large bottle before going through the security checkpoint, and if you want to stay hydrated you can fill it again after you pass security.
Even unopened bottles of 12 oz / 355 ml will not be accepted.
I wanted to find more answers from the TSA social media.
Here is an answer from the TSA customer service.
@Judelqui wanted to bring this stainless steel water bottle in carry-on baggage.
The AskTSA team replied that empty metal containers are allowed through the screening checkpoint and in carry-on bags.
All passengers are subject to additional screening, even if they are TSA Precheck members.
The same answer are given to Bonnie who wanted to bring this an unopened 12 oz bottle of Voss water is allowed in a carry-on,
The helpful TSA folks replied liquids must be 3.4 oz or less in carry-on bags
Can You Take An Empty Water Bottle On A plane?
Here is what the TSA has to say about empty water bottles on its website.
As you can see in the screenshot bellow the TSA have a green checkmark for taking empty water bottles in both carry-on and checked bags.
Bring an empty bottle is not complicated.
You can just place one inside your bag, and you don’t need to take out when going through the security.
And don’t need to go in your plastic liquids bag.
Bringing an empty reusable bottle can save you $10 or more per trip.
Option
Average Cost
Airport bottled water
$3 – $6
Airplane bottled water
$2 – $5
Refill station
Free
Water fountain
Free
Can You Carry Water Bottles In Checked Luggage?
You can bring both an empty and filled water bottle in checked baggage without any issues.
However, ensure that your bottle is well secured so the water won’t mess up your items.
Although, sometimes it is better to avoid placing water in a checked bag because it will add some weight.
In addition, you can easily find water at your destination.
You may also mess up your belongings and your suitcase in case the water bottle leaks.
Are There Any Restrictions On The Type Of Bottle You Can Bring?
Nope, you can bring any type of empty bottle you want.
Whether you ant ottos ring a plastic water bottle, a stainless steel , glass, or metal you are good to go.
Even though you will need to make sure that it does not have any prohibited items.
For example, a water bottle that is decorated with some type of long metal spikes that can be used to hurt someone.
You may have a hard time convincing the security officer at the airport.
But in general, most airlines and airport securities do not mind if the bottle is steel, plastic, or glass.
Can You Carry Water Bottles On International Flights?
Photo by Maël BALLAND on Pexels.com
Water, or liquids in general, have almost the same restrictions whether you are traveling on a domestic or an international flight.
You can only bring a water bottle that is 3.4 oz / 100 ml or less when going through the security checkpoint.
But you can fill or buy a water bottle once you clear the security.
It doesn’t matter what airline you are flying with, but if you want to buy bottled water it may be a bit pricey at some airports or even on board the airplane.
I always like to bring a bought at a store water bottle and drink it on my way to the airport and keep the empty bottle, or sometimes I fill my Hydroflask just after I clear the security.
But when traveling with a bottle like a Hydroflask, you may need to remove the lid as you go through security to prove it’s empty.
Some airports in Europe are getting new smart scanners. so travelers may be able to bring large bottles of liquids on the plane. Instead of small 3.4 oz / 100 ml bottles , in carry-on bags. This change started around 2024 and is still happening in 2025 and 2026
Final Thoughts
Now as you know that you can’t bring a full size filled bottle of water that is more than 3.4 oz / 100 ml in carry-on.
Because of the limits on the quantity of liquids you can take on board airplanes, while there are less restrictions for checked baggage.
The rules apply to both domestic and international flights.
If you want to bring a bottle of water to drink during your flight, ensure that you take an empty bottle and refill it once you pass the airport security.
I hope this helps.
Happy travels.
FAQs about taking water bottles on a plane
What Happens If Your Water Bottle Is Not Empty At Airport Security?
If your water bottle contains more than 3.4 oz / 100 ml of liquid, security officers will ask you to either, empty the bottle or leave the bottle.
Can You Bring Ice In A Water Bottle On A Plane?
Yes, you can bring ice through airport security because solid ice is allowed. However, if the ice melts and becomes liquid before screening, it needs to follow the 3.4 oz / 100 ml liquid rule, just like water.
Can You Buy Water At The Airport And Take It On The Plane?
Yes, once you buy any water after the security checkpoint then you have nothing to worry about.
Can You Take A Metal Water Bottle On A Plane?
Yes, metal bottles such as stainless steel or insulated bottles are good to go in carry-on bags. The bottle must simply be empty when passing through security, if they are more than 3.4 oz / 100 ml.
Can You Bring A Water Bottle On A Plane For A Baby?
Yes, if you are traveling with a baby, you are allowed to bring reasonable quantities of water for baby formula or baby food, even if it exceeds the normal liquid limits. These items may be inspected and scanned separately at security.
Can You Take A Water Bottle On An International Flight?
Yes, the same rules generally apply to international flights. Most airports follow the 100 ml / 3.4 oz liquid rule for carry-on bags. And empty water bottles are allowed through security and can be refilled once you clear the security.
Why Can’t You Bring Water Through Airport Security?
The liquid restriction rule was introduced in 2006 to prevent some bad guys from taking dangerous liquids on board the airplane. Limiting liquids to 3.4 oz / 100 ml containers makes it easier for security officers to screen passengers quickly and safely.
Can You Take A Hydro Flask On A Plane?
Yes, you can take a Hydro Flask or any other reusable bottle on a plane. But the bottle must be empty when going through airport security. Once you clear the security, you can refill it at a water fountain, hydration station, or buy a drink at the airport and refill it into your bottle.
Gargie, is writer, traveler & a digital marketing specialist
passionate about traveling and exploring new cultures. She is a savvy traveler who likes to pack light, testing various luggage brands and seeking out budget-friendly airline options. Gargie enjoys creating unique recipes when she’s not on the go.
