As a frequent traveler and aviation security expert, I have a deep understanding of the regulations and requirements for carrying liquids in plastic bags when flying. It's crucial to adhere to these guidelines to ensure a smooth and hassle-free airport experience. Here's a comprehensive guide on what needs to go in a plastic bag when flying, especially regarding liquids and gels in carry-on luggage.

**Step 1: Understanding the 3-1-1 Rule for Carry-Ons**
The 3-1-1 rule is a key guideline for liquids, gels, creams, and aerosols in carry-on luggage. It's important to note that this rule applies to all US-bound international flights and all domestic flights within the United States.

- 3.4 Ounce (100ml) Bottle or Less: Each container of liquid must be 3.4 ounces (100ml) or smaller. This is a security measure to prevent the transportation of large volumes of potentially dangerous liquids on planes.
- 1 Quart-Sized Clear Plastic Zip-Top Bag: All liquids must be placed in a single, clear, quart-sized (approximately 946ml), zip-top plastic bag. This makes it easy for security personnel to inspect the contents.
- 1 Bag Per Passenger: Each passenger is allowed one such bag to be placed in the screening bin. This limits the total liquid volume each traveler can bring.

Step 2: Preparing Your Plastic Bag
To prepare your plastic bag, follow these steps:


1. Choose the Right Bag: Ensure you have a quart-sized, clear plastic, zip-top bag. It should be easy to seal and open for security checks.

2. Gather Your Liquids: Collect all your liquids, gels, creams, and aerosols. This includes items like shampoo, conditioner, lotions, toothpaste, and any other liquid products you plan to carry on.

3. Check the Volume: Make sure each container is 3.4 ounces (100ml) or less. You can find this information on the product label.

4. Place in the Bag: Put all the compliant items into the plastic bag, ensuring it doesn't exceed the quart size when filled.

5. Seal the Bag: Zip the bag securely to prevent spills and to be ready for inspection.

Step 3: At the Security Checkpoint
When you arrive at the security checkpoint:


1. Remove the Bag: Take your plastic bag out of your carry-on and place it in a separate bin for screening.

2. Follow Instructions: Listen to the security personnel's instructions and follow them accordingly. They may ask you to remove additional items or undergo additional screening.

3. Inspection: The security officers will inspect your bag and its contents. If you've followed the 3-1-1 rule correctly, you should have no issues.

Step 4: Beyond the Security Checkpoint
Once you've cleared security:


1. Reassemble Your Belongings: After your items have been screened, gather your plastic bag and any other belongings and reassemble your carry-on.

2. Double-Check: Make sure you haven't forgotten anything in the screening area.

3. Enjoy Your Flight: With your liquids safely secured in your carry-on, you can now proceed to your gate and enjoy your flight.

Additional Tips
- Label Your Bag: Consider labeling your plastic bag with your name and contact information in case it gets misplaced.
- Pack Smart: Pack your liquids in a part of your carry-on that's easy to access, as you'll need to remove it for screening.
- Check for Updates: Security regulations can change, so it's a good idea to check for updates before your trip.

By following these guidelines, you can ensure that your liquids are packed safely and securely, allowing for a smooth airport experience and a hassle-free journey.

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3-1-1 for carry-ons = 3.4 ounce (100ml) bottle or less (by volume) ; 1 quart-sized, clear, plastic, zip-top bag; 1 bag per passenger placed in screening bin. One-quart bag per person limits the total liquid volume each traveler can bring. 3.4 ounce (100ml) container size is a security measure.May 8, 2017read more >>