Don't Get Grounded: Everything You Need to Know About Liquids in Your Carry-On!

Traveling by airplane can be an exciting and nerve-wracking experience, especially for families with children. One aspect of air travel that often causes confusion is what items can be brought on board. In particular, many travelers wonder how many ounces of liquids they can carry on a plane.

Here, we’ll tackle the TSA liquid rules for carrying liquids in carry-on luggage within the United States, exceptions to this rule, and tips on packing reusable travel containers so they don’t make a huge mess. After all, you don’t want to get to the airport with a new snow globe souvenir only to have to leave it behind because of the 3-1-1 rule! It happens more than you’d think.

This article contains affiliate links. We earn from qualifying purchases.

Whether you’re jetting off on an adventurous expedition for your summer vacation or embarking dreamy beach getaway or Alaska cruise, knowing what you can and can’t pack is essential for a smooth journey. Let’s dive into the liquid rule and ensure you’re well-prepared for your next family adventure.

Related: If you need some destination inspiration, see these summer vacation ideas near me.

How Many Ounces Can I Carry on a Plane?

The Transportation Security Administration (TSA) has a “3-1-1” rule for how much liquid can be brought on board in your carry-on baggage when flying. This airplane liquid limit mandates that any liquid carried on the plane must be in containers that are 3.4 fluid ounces (100 milliliters of liquid ) or less, and these containers must fit into one clear, one-quart-size, resealable bag.

Note: Each person traveling may bring one quart-sized bag of liquids in their personal item or carry-on bag. So if you are traveling with 2 adults and 2 children, you can bring up to 4 quart-sized bags.

What is Considered a “Liquid”?

The Transportation Security Administration (TSA) defines liquids as items such as drinks, sprays, liquid gels, aerosols, creams, and pastes. This includes foods like jam and peanut butter. The most common travel “liquids” include the following items:

shampoo
conditioner
sunscreen (lotion & spray)
makeup (including foundation and setting spray)
toothpaste
nail polish
shaving cream
body lotion
perfume and cologne
mouthwash
hand sanitizer
liquid medications
bottled water

Furthermore, this definition includes items that are liquid at room temperature but solidify when cold (for example honey). For convenience’s sake, it’s best to pack all of your potentially questionable items in your 1-quart bag for easy inspection or pack the items in your checked luggage.

For a current list of TSA rules, a full list of liquid items you can bring aboard, what has to be packed in your checked bag, and what’s prohibited (like flammable liquids), see the TSA website for more information.

Exceptions to the 3-1-1 Liquid Rule

Now that you know the basics behind the 3-1-1 rule and what constitutes a “liquid” according to TSA regulations, it’s time to talk about exceptions.

Certain items are considered “medically necessary” or for the use of infants and are exempt from the 3-1-1 rule and can be brought on board in larger quantities, as long as they are declared to the TSA.

Prescription Medications

When carrying prescription medication, it is best to keep them in your hand luggage, whether they are in liquid or solid form. It is important to have either the original container with your name on it or a doctor’s note to show to the TSA officer. Make sure to declare these medications so they can be screened separately to avoid any complications that could result in additional screening procedures.

Baby Formula, Breast Milk, Juice, & Baby Food

If you are flying with an infant or toddler, you are allowed to bring on board reasonable amounts of baby food, formula, toddler drinks, or breast milk, that exceed the 3.4 ounces size. These items do not need to be in a quart-sized plastic bag either but must be declared to a TSA agent at the security checkpoint and also be screened separately.

Additionally, parents can travel with frozen ice packs, gel packs, or freezer bags to keep these items cold. The only stipulation is that these gel/ice packs must be frozen solid.

Tips for Packing Liquids In Your Carry-On Bag

Now that you know the size and quantity restrictions, let’s explore some handy packing tips to maximize your carry-on space while abiding by the liquid rule.

Use travel-sized toiletries to save space

Investing in travel-sized toiletries, such as shampoo, conditioner, and lotion, not only keeps you within the liquid limits but also saves valuable space in your bag. You can find many popular brands at Walmart and other stores that offer mini versions of their products, making it convenient for travelers to pack efficiently.

Personally, I have these reusable plastic, travel-sized toiletry bottles (shown below) and these silicone GoToob containers (not shown). Both are easy to pack, close securely and are refillable with my favorite shampoo and conditioner without having to waste single-use plastic or risk leakage in my bag.

Prevent liquids from leaking with a little plastic wrap

Using a thin layer of plastic wrap before screwing the lid on can help to prevent any accidental leaks and spills. This is especially useful if you plan to bring any sized bottles or containers with a liquid or gel-like substance. It’s extra protection in case your bag gets tossed about during transit or seeps out due to a change in atmospheric pressure.

Bring an empty reusable water bottle

Bringing your own empty reusable water bottle can save you from having to buy a single-use bottle at the airport or pay ridiculously high airport prices for a single bottle of water. Empty water bottles are allowed in carry-on luggage as long as they are empty. After passing through security, you can fill them up at a water foundation.

Opt for a resealable silicone bag over single-use plastic

Bringing a resealable silicone bag eliminates the need for single-use plastic bags and allows you to pack multiple toiletries in one container. I’ve been using Stasher silicone bags for years and find them 100 times more durable than plastic. I use them for everything from my 3-1-1 bag to snacks, cord storage, and even for keeping my phone dry while on the beach. Since they are reusable, they make an eco-friendly alternative to single-use, clear plastic bags.

Find Stasher Bags at Target, Walmart, Amazon, and Stasher.com.

Pack liquids in an organized manner to avoid spills

To avoid any unpleasant surprises upon opening your bag, organize your liquids in a way that minimizes the risk of spills. Consider placing them in a separate toiletry bag or using resealable plastic pouches for added protection. Additionally, be mindful of how you position your liquid containers within your carry-on to prevent unnecessary pressure or squeezing.

Explore non-liquid options for toiletries

Nowadays, there are many non-liquid options for toiletries that don’t require any kind of container or bag. These products have been gaining popularity among travelers and gap year adventurers due to their lightweight, mess-free packaging, and exceptions to the carry-on liquid size rules.

For instance, solid shampoo bars, laundry detergent sheets, and toothpaste tablets can be found. I really like HiBar solid shampoo and conditioner bars that come in plastic-free packaging, making them a great way to stay within the 3-1-1 rule while preserving the environment.

Breeze through the airport security

To make the security screening process smoother at the TSA checkpoint, it’s a good idea to pack your liquid bag in an easily accessible location, such as the top pocket of your carry-on bag. You should also make sure that all your items are properly labeled as this can help to avoid delays or confusion. I always carry a thin Sharpie permanent ink pen so that I can easily label my bottles or other things if needed while traveling.

Another way to breeze through security is by having TSA Precheck, Global Entry, Nexus, and/or CLEAR. Each of these paid services allows you certain privileges including keeping your shows on at TSA airport screening and the ability to leave your liquid bag inside your carry-on or personal item.

Also be sure to know how much cash can you fly with when you travel. Depending on the country, there are different regulations regarding the amount of cash allowed to be taken in and out of a given country. Knowing these limitations is important for making sure your travel goes smoothly and without any surprises at the airport.

FAQs about Carry-On Liquids

Before I sum everything up, let me answer common questions related to liquid restrictions

Can I carry water on a plane?

Yes, you can bring a filled water bottle on the plane after passing through security. However, be aware that you will need to empty it or place it in a resealable bag before going through the metal detector.

Can I bring a reusable water bottle through security?

Yes, you can bring an empty reusable water bottle through airport security.

How many fluid ounces can I carry on a plane?

The TSA liquid limit is 3.4 oz. You are allowed to bring liquids in containers up to 3.4 ounces or 100ml.

How many ounces can you take on a plane?

In your carry-on bag or personal item, you are limited to containers of liquids, gels, and aerosols no larger than 3.4 oz. In your checked baggage, there is no airplane liquid limit. But there are rules on the total weight of the checked bag.

Can I bring alcohol on a plane?

Alcohol that is purchased in duty-free shops can be carried onto the plane, but alcoholic beverages can not be consumed during the flight.

How many 3-ounce bottles can I carry on?

You can bring multiple 3.4-ounce containers as long as they all fit into the quart-sized bag, but the total content must not be larger than 3.4 ounces (100 milliliters).

Can I bring food on a plane?

Yes, you can bring food items on a plane as long as it is not a liquid or gel-like substance. If it is in these forms, then it must adhere to the 3.4-ounce (or less) restriction.

Can I pack liquids in my checked luggage instead?

Yes, you can pack liquids in your checked baggage instead. These items do not have to adhere to the 3-1-1 rule and they can exceed the 100ml size.

Is there a 3-1-1 Rule for International Flights?

Yes, the 3-1-1 Rule applies to international flights as well. However, some countries may impose additional restrictions on what you can bring onboard, so it is best to check with your airline before packing.

Are snow globes allowed in my carry-on bag?

No, snow globes are not allowed in any carry-on luggage due to their liquid content. You will have to pack it in checked baggage instead.

In Summary

When it comes to how much liquid can you take on a plane, the answer really does depend on a few factors. The basic rule is one clear quart-size bag of liquids, with travel-sized containers holding no more than 3.4 ounces each.

There are some exceptions for medically necessary items and those items purchased after the security checkpoint. It’s important to keep in mind that this rule also applies to gel-based or creamy products, but solid items are generally allowed without limit.

If you’re traveling with children, there are allowances for items such as baby food, formula, and breast milk. With some preparation and an understanding of the rules, you can pack confidently and enjoy your trip without any airport stress.

For more family travel inspiration, check out our latest posts here:

Ready to Start Planning Your Trip? Use These Helpful Links to Book Your Trip!

AIRFARE
- Find low fares with airfarewatchdog, Skyscanner, and WayAway.com.
- Get airfare deal alerts up to 90% off from Dollar Flight Club (free & paid membership options)
- Book your plane ticket with Expedia or Kayak
- Book your Airport Parking Reservations and save money.
ROAD TRIP/CAR RENTAL
- Take the scenic route and rent an RV from RVShare
- Get packed for an epic road trip and don’t forget the Road Trip Games to Play in the Car Need more space? Get a rental car thru Discovercars.com.
LODGING
- From hotels to private homes, find the perfect accommodation with Hotels.com or booking.com.
- For camping and RV campgrounds, find the ideal location with Campspot.
PACKING
- Travel in style with a suitcase, carry-on, backpack, or handbag from Away and Eagle Creek.
- For packing cubes, we love these from Eagle Creek and these reusable silicon bags for a 3-1-1 bag from Stasher.
TRAVEL PLANNING
- Looking to start travel hacking and want a place to keep track of it all? There’s the free TravelFreely site.
- For budgeting help, get our road trip budgeting tips here.
ATTRACTIONS/ACTIVITIES
- Save on tickets to attractions, sightseeing tours, and more with
  - Tiqets for cultural events, museums, Broadway shows, etc.
  - CityPASS for multi-day attraction passes at up to 55% off in select cities
  - Get Your Guide and Viator for guided tours/excursions, day trips, and activitties
  - Groupon for discounted local attractions and event tickets
  - Undercover Tourister for discounted theme park tickets
- Find guided outdoor activities led by local guides at 57Hours.
- Find information on local trails with the AllTrails App.
LEARN A FOREIGN LANGUAGE
- We use and recommend Rosetta Stone to learn a new language. We bought the $179 lifetime option with unlimited access to ALL 25 of their languages.
Need something else to plan your perfect trip? Visit my travel resources page for more trusted partners.

Don’t Get Grounded: Everything You Need to Know About Liquids in Your Carry-On!

How Many Ounces Can I Carry on a Plane?

What is Considered a “Liquid”?