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3-1-1 Rule for Liquids: Your Complete TSA Carry-On Guide (2026)

3-1-1 Rule for Liquids

Going on an air trip may be fun, but having your carry-on right will make your travel less stressful and will make you pass the airport security faster. There are many things travelers have to know regarding security, but the first thing that comes to mind is the 3 1 1 rule for liquids. It is useful for anyone who travels both on vacation and for work purposes.

Bookyourairticket gives travelers up-to-date information and guides on air trips. Our new guide is all about the 3 1 1 rule for liquids. You will learn how to pack your liquids and will get answers to some FAQs.

What is the 3 1 1 Rule for Liquids?

The 3 1 1 rule for liquids is a TSA rule regulating the maximum amount of liquids, gels, creams, aerosols, and pastes one may pack in his or her hand luggage.

The meaning of this abbreviation is as follows:

  • 3 = All containers should not exceed 3.4 ounces (100 milliliters)
  • 1 = All containers should be packed in one clear quart-sized plastic bag with zip lock
  • 1 = Only one plastic bag per passenger

This regulation is relevant for passengers using TSA security checkpoints in the USA and followed in many airports of the world with similar rules.

Why Was the 3 1 1 Rule Created?

The 3 1 1 rule for liquids was designed to ensure the security of flights. The limitation of the volume and quantity of liquid items in luggage allows decreasing security threats while maintaining a possibility to carry necessary personal hygiene products.

Nowadays, this rule is one of the most popular airport security regulations.

Liquids Definition

There are many people who believe that drinks alone constitute what is referred to as liquids; however, the TSA defines some other things as liquids in their 3 1 1 guidelines for liquids.

They include the following:

  • Shampoo
  • Conditioner
  • Body wash
  • Toothpaste
  • Lotions
  • Sunscreen
  • Liquid cosmetics
  • Foundation
  • Lip gloss
  • Perfume
  • Hair gel
  • Hair spray
  • Cream
  • Liquid soap
  • Hand sanitizer
  • Deodorant (gel or spray)
  • Peanut butter
  • Yogurt
  • Honey
  • Salad dressing
  • Syrup

Anything that can be poured, sprayed, squeezed or spread is likely to be regarded as a liquid, gel or aerosol.

What Can Be Carried under the 3 1 1 Rule?

There can be multiple travel-sized containers provided that:

  • Each individual container has 100ml (3.4oz) or less
  • All the containers are in one quart-sized clear zip-top bag
  • The bag is sealed properly
  • Each passenger is to have one bag only

For example:

  • Travel sized shampoo – 3oz
  • Toothpaste – 3oz
  • Facial wash – 2oz
  • Sunscreen lotion – 3oz
  • Body lotion – 2oz

If all these products are to fit in one quart-sized bag, then they are allowed in the carry-on baggage.

What Happens if Your Liquid is Bigger than 3.4 Oz?

Many people make the mistake of taking a partially filled container which has more than 3.4oz.

For example:

  • Container for shampoo which has a total capacity of 10oz with 2oz left

The maximum size of the container is considered by the TSA.

To overcome this problem, you should transfer your products in the TSA approved travel-size containers.

Carry-On vs Checked Luggage

The 3 1 1 liquid rule is only applicable to the carry-on luggage.

There is a lot more room when using checked luggage.

Generally, passengers can travel with:

  • Shampoo (full size)
  • Sunscreen (bottle size)
  • Perfume
  • Body lotion
  • Cosmetics
  • Hair products

It is important to ensure that the caps on all the bottles are tightly sealed.

Exemptions

Some liquids are not bound by the 3 1 1 liquid rule.

They include:

Medication

Passengers can carry with them:

  • Prescription medication
  • Liquids for use as medication
  • Gels for use as medication
  • Eye drops
  • Creams for use as medication

Infant Needs

Infants can accompany passengers with some items such as:

  • Infant formula
  • Breast milk
  • Juice for infants
  • Baby food

Medical Nutritional Liquids

Passengers with special medical needs can travel with necessary nutrition liquids.

Packing Tips for Liquids

Proper packing will help in making the process of airport security faster.

Remember these helpful tips:

  • Get travel size toiletries.
  • Choose leak-proof travel bottles.
  • Label your refills.
  • Pack your liquids in a clear zip bag.
  • Store the bag in an accessible place in your luggage.
  • Take out the bag when asked by security officers.
  • Keep medications in a separate pack.
  • Do not fill bottles to the brim.

A few steps will help save precious time at airport security checkpoints.

Typical Errors Made by Passengers

Some passengers fail to abide by the 3 1 1 rule of packing liquids.

Common errors are:

Using large-sized bottles

Bottles that are partly filled but are bigger than 3.4 ounces are not allowed.

Overlooking liquid makeup

Foundation, concealers, lip gloss, and mascara are considered liquids.

Wrongly packing aerosols

Hairsprays and travel size deodorants are also subject to the rule.

Using food spreads

Examples of foods that are considered liquids include peanut butter, cream cheese, and dips.

Carrying multiple plastic bags

International Travel Guidelines

While many countries adopt similar guidelines on liquids, the security policies in airports may differ.

In case you are traveling internationally, ensure to familiarize yourself with the security guidelines of your departure airport prior to departure.

In case you are making stops in different countries, ensure to comply with the toughest set of guidelines.

Frequently Asked Questions

Can I bring water through airport security?

No. Water exceeding 3.4 ounces should be disposed of before you pass through airport security. However, you can refill an empty container once you have cleared the airport security checkpoint.

Is toothpaste a liquid?

Yes. Toothpaste is a gel and therefore subject to the 3 1 1 rule.

Can I bring perfume in my carry-on luggage?

Yes. Each bottle should be 3.4 ounces (100 ml) or less.

Is lipstick a liquid?

Traditional lipstick is unrestricted. Lip gloss or liquid lipstick is subject to the liquid guideline.

Can I bring deodorant in my hand luggage?

Unrestricted as long as the deodorant is solid. Gels and sprays are subject to the 3 1 1 rule.

Are wet wipes regulated as liquids?

No. Wet wipes are not restricted.

Best Travel Accessories that will Ensure Your Compliance with TSA

It becomes easy to pack when you have certain travel accessories.

It would be helpful to bring:

  • TSA compliant travel bottles
  • Non-leaking travel toiletry packs
  • Clear quart sized zip lock bags
  • Toiletry organizers
  • Water resistant cosmetic cases
  • Silicone refillable bottles
  • Labels for your luggage

These affordable travel accessories will help you stay organized and comply with airport security procedures.

Conclusion

Comprehending the 3 1 1 rule regarding liquids is probably the most effortless way not to face any delays and have an effortless airport experience. Having your travel-sized toiletries, a clear quart sized bag, and following TSA recommendations will speed up your security check significantly.

Regardless of whether you will be traveling domestically or overseas, spending just a few minutes on organizing your carry-on luggage will save you a lot of time in the airport.

At Bookyourairticket, we aim to assist our clients in making the right choices before their flights. Our site contains information about baggage allowances, TSA rules and recommendations, booking advice and many others. Prior to your next flight, keep in mind the 3 1 1 rule for liquids.

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