How to Pack a Toiletry Case for TSA Security

Quick answer

Use a clear, quart-sized bag or a dedicated toiletry case with a transparent pouch for liquids, and keep every container at 3.4 ounces (100 ml) or less. Pack liquids, gels, and aerosols in that one bag, and place it at the top of your carry-on so you can pull it out at security. Solid toiletries like bar soap and stick deodorant don't count toward the limit, so use them to free up space.

Packing toiletries for a flight can feel like a puzzle, especially when you're trying to follow the 3-1-1 liquids rule and still bring everything you need. The good news is that a little strategy goes a long way. Whether you're a frequent flyer or heading out on a once-a-year trip, the goal is the same: get through security without a hitch and arrive with your essentials intact.

This guide walks you through the exact steps to pack a TSA approved toiletry case, from choosing the right bag to organizing it for easy access. We'll also cover common mistakes that slow you down at security and how to avoid them. By the end, you'll have a repeatable system that works for any trip length.

Understand the 3-1-1 liquids rule

The 3-1-1 rule is the foundation of packing carry on toiletries for US flights. Each container must be 3.4 ounces (100 ml) or less, all containers must fit in one clear quart-sized bag, and each passenger is allowed one bag. This applies to liquids, gels, aerosols, creams, and pastes—so toothpaste, lotion, hair gel, and even peanut butter count.

Some items are exempt or treated differently. Solid deodorant, bar soap, and powdered makeup don't count as liquids. Medications, baby formula, and breast milk can exceed the limit but must be declared at security. If you're unsure, check the TSA website before you fly, as rules can change.

• Use travel-sized containers and fill them from larger bottles to save money and reduce waste.
• Keep the quart bag accessible—don't bury it in your carry-on.

Choose the right toiletry case

Not all toiletry cases are created equal. For TSA purposes, a clear pouch or a case with a transparent compartment makes it easy to show your liquids without unpacking everything. Look for a case that's roomy enough for your essentials but compact enough to fit in your carry-on. The Metro Cosmetic Case, for example, has a main compartment for larger items, elastic loops for brushes and tools, and a clear zippered pocket under the lid that's perfect for your 3-1-1 bag.

If you prefer a dedicated liquids bag, a simple quart-sized zip-top bag works, but it can tear or leak. A reusable clear pouch is more durable and eco-friendly. Whichever you choose, make sure it's easy to open and close, and that it fits within your carry-on dimensions.

• Avoid opaque cases for your liquids—security may need to see them.
• Consider a case with a removable pouch for smaller items, like the Metro Cosmetic Case, to keep things organized.

Decant and organize your toiletries

Start by grouping your toiletries into three categories: liquids, solids, and tools. Liquids go into your 3-1-1 bag. Solids like bar soap, solid shampoo, and stick deodorant can go in the main compartment of your case. Tools like razors, nail clippers, and tweezers are allowed in carry-on but should be protected to avoid injury or damage.

Decanting your products into smaller containers is key. Use travel bottles with leak-proof caps, and label them if the contents aren't obvious. For powders and pills, use small pill organizers or contact lens cases. Remember that the 3-1-1 rule applies per container, not per product, so a 6-ounce bottle half-full is still not allowed.

• Squeeze bottles slightly before closing to create a vacuum seal and prevent leaks.
• Place a small piece of plastic wrap under the cap for extra leak protection.

Pack your case for easy security access

How you pack your case matters as much as what you pack. Put your 3-1-1 bag at the top of your toiletry case or in an outside pocket so you can grab it quickly. If your case has a clear compartment, use that for liquids. Keep solids and tools in separate sections to avoid mixing and to make it easy to find what you need.

When you pack your carry-on, place your toiletry case near the top or in an accessible pocket. You'll need to remove your 3-1-1 bag at security, so don't bury it under clothes or other items. If you're using a backpack, the front pocket is ideal. For a rolling suitcase, the lid compartment works well.

• Double-check that your 3-1-1 bag is sealed and not overfilled—it should zip easily.
• Keep a small microfiber cloth in your case to wipe up any spills.

Common mistakes to avoid

One of the biggest mistakes is assuming that all travel-sized items are allowed. Some containers are larger than 3.4 ounces even if they're partially full. Another mistake is packing liquids in multiple bags—TSA allows only one quart-sized bag per person. If you're traveling with a companion, you can't combine your liquids into one bag unless it's within the size limit.

Also, don't forget to check the rules for your destination. If you're flying internationally, the 3-1-1 rule may differ, and some countries have stricter limits. And always check the TSA's current guidelines before you fly, as rules can change.

• Don't pack sharp objects like scissors with blades longer than 4 inches in carry-on.
• Avoid packing powders over 12 ounces in carry-on if you're flying to the US—they may require additional screening.

Step-by-step: Packing your TSA toiletry case

1. Gather and sort your toiletries: Separate all items into liquids, solids, and tools. Liquids include anything that spreads or pours at room temperature. Solids include bar soap, solid deodorant, and powders. Tools include razors, nail clippers, and tweezers. Checkpoint: If you're unsure whether an item is a liquid, it probably is—pack it in your 3-1-1 bag.
2. Decant liquids into 3.4 oz containers: Transfer shampoos, conditioners, lotions, and gels into travel-sized bottles. Label each bottle. Fill them no more than 90% full to allow for expansion and prevent leaks. Checkpoint: Each container must be 3.4 oz (100 ml) or less. Larger containers, even if partially full, will be confiscated.
3. Pack your 3-1-1 bag: Place all liquid containers into one clear quart-sized zip-top bag. Seal the bag, pressing out excess air. Make sure it can close completely without stretching. Checkpoint: One bag per passenger. If you're traveling with a partner, each person needs their own bag.
4. Organize your toiletry case: Put your 3-1-1 bag in the clear pocket or top section of your toiletry case. Place solids in the main compartment and tools in elastic loops or a separate pocket. Use a small pouch for items like swabs and hair ties. Checkpoint: Your 3-1-1 bag should be easy to remove without unpacking the entire case.
5. Pack your case in your carry-on: Place your toiletry case near the top of your carry-on or in an outside pocket. If you're using a backpack, the front pocket is ideal. For a rolling suitcase, the lid compartment works well. Checkpoint: At security, you'll need to remove your 3-1-1 bag and place it in a bin. Keep it accessible to avoid slowing down the line.

Products that make TSA packing easier

• Metro Cosmetic Case: Designed for effortless organization, with a main compartment for larger cosmetics and toiletries, elastic loops for brushes and tools, and a clear zippered pocket under the lid for securing extras. The clear pocket lets you keep your 3-1-1 liquids visible and easy to remove at security, while the elastic loops keep small tools from shifting.
• Metro Crossbody: Features a roomy main compartment with a two-way zipper, a zippered pocket that divides the interior, four card sleeves, and a hanging pocket. If you're traveling with a personal item only, this bag can hold your toiletry case and other essentials, with pockets to keep your passport and cards organized.

Packing a TSA approved toiletry case doesn't have to be stressful. Follow the 3-1-1 rule, choose a case with clear compartments, and organize your items so you can breeze through security. With a little practice, you'll have a system that works for every trip.