In order to ensure flight safety, the U.S. Transportation Security Administration (TSA) has extremely strict regulations regarding the specifications of liquids carried by passengers. The 3-1-1 security rule clearly states that liquids carried by passengers must be contained in a 1 quart size bag. If the liquids do not meet the TSA 3-1-1 security rule must be checked in.
The U.S. Transportation Security Administration (TSA) 3-1-1 rule affects not only millions of backpack passengers but also a host of B2B backpack sellers, including brands, distributors, and retailers. This rule imposes higher requirements on backpack product design, compliance, and customer satisfaction.
This guide covers the specific dimensions, compliant materials, design considerations, and key considerations for TSA-approved one-quart bags when purchasing in bulk or customizing one-quart bags for B2B buyers.
TSA Quart Size Bag Dimensions
| Inches | Centimeters | |
| Standard size | 7″ × 8″ | 17.8cm × 20.3cm |
| Optimal size | 6″ × 9″ | 15.2cm × 22.9cm |
| Volume | 1 quart | approx. 0.95L |
What is TSA 3-1-1 Rule?
When talking about TSA quart size bag requirements, the 3-1-1 rule is crucial. It governs the amount of liquids, gels, and aerosols passengers can carry in carry-on baggage.
The 3 in 3-1-1 refers to the limit of 3.4 ounces (100 ml) per liquid container; the 1 refers to the limit of quart-sized bags; and the final 1 indicates that each passenger is limited to one quart-sized bag.
Why Does The TSA Have The 3-1-1 Rule?
The 3-1-1 rule stems from the 2006 transatlantic terrorist attacks. To prevent further liquid bomb attacks, the TSA immediately implemented a ban on liquids, gels, and aerosols in carry-0n bag. In 2007, the ban was changed to allow passengers to carry no more than 3.4 ounces of liquids, and liquids must be packed in a quart-sized bag for security screening.
What Is A Quart size Bag?
TSA’s 3-1-1 rule mentions quart size bag. Many people are confused about what this means, especially first-time travelers to the United States. Understanding what a quart size bag is can help you avoid unnecessary hassles during security screening.
In fact, a quart size bag refers to a transparent, reusable bag with a capacity of one quart.
How Big Is a TSA Quart Size Bag?
The quart size bags dimension of TSA approved are available in standard and optimal sizes. The standard quart size bag measures 7 x 8 inches (17.8 cm x 20.3 cm). For example, Ziploc’s “Quart Size Freezer Bags” are a common choice that complies with U.S. TSA regulations.
The optimal dimensions for a quart size bag are 6 x 9 inches (15.2 cm x 22.9 cm). The size ensures compliance with TSA regulations even when fully filled, reducing unnecessary hassle at airport security.
In fact, a quart size bag is roughly this big:
- Compact enough to fit in one hand
- About the size of a small paperback book when laid flat
- Can hold approximately 6 to 10 travel-sized bottles (0.3–0.6 liters)
Materials for TSA Approved Quart Size Bags
Quart size bags compliant with TSA regulations must be transparent, allowing a clear view of their internal structure. The requirement is primarily to facilitate airport security personnel in quickly inspecting the contents without opening the bag, improving efficiency. Therefore, common materials for quart-sized bags include:
- Polyethylene: Quart size bags made of polyethylene offer numerous advantages, including being lightweight, soft, easy to clean, and affordable. They are a popular and familiar type among TSA security personnel.
- TPU: Quart size bags made of TPU are highly durable, effectively resisting tears and punctures, and are easy to clean. However, TPU quart-sized bags are more expensive.
- PVC: While quart size bags made of PVC are also durable, they are less environmentally friendly and are gradually being replaced by the two materials mentioned above.
What Types of Quart-sized Bags Are Available?
The TSA does not have strict or specific requirements for quart size bags, and they must meet the following requirements: a quart-sized capacity, transparency, and resealability.
Disposable Zipper Bags
Disposable zipper bags are typically made of polyethylene. They are thin, transparent, and relatively inexpensive, and can be purchased at your local supermarket. However, it’s important to note that while disposable ziplock bags can be reused, you need to be careful about them breaking. They’re more suitable for shorter trips.
Toiletry Bags
Many toiletry bags are specifically designed as quart bags for travel. They’re typically made of thicker, more durable TPU or vinyl plastic, making them less prone to breakage. Their double zippers or airtight seals effectively prevent leaks, making them suitable for longer trips. However, toiletry bags are more expensive than disposable ziplock bags.
Roll-top Bags
Roll-top bags typically roll down and seal with a fastener. They also come in transparent styles, so as long as the capacity meets your needs, they can also be used as quart bags. However, they may not be as convenient as ziplock bags or toiletry bags.
Common Mistakes When Packing Liquids
- Oversized containers: TSA rules state that liquid containers must not exceed 3.4 oz / 100 ml. Even empty containers larger than this size are not allowed in carry‑on luggage.
- Wrong storage bag: Liquids in compliant containers must be placed in a clear, quart‑sized resealable bag.
- Overstuffed quart bag: Do not overpack the quart bag. Make sure it can close easily and reseal properly.
- Excessive number of bags: Each traveler is permitted only one clear quart bag for liquids.
- Poor placement: Stashing the quart bag deep inside carry‑on luggage slows down screening because it cannot be accessed quickly.
How to Pack Liquids in Carry‑On Luggage Correctly
Follow these simple steps to avoid delays:
How to Choose the Right Quart Bag
- Must be transparent so screeners can clearly see contents without unpacking.
- Must be sturdy — thin plastic bags tear easily. Choose durable materials like PVC or vinyl.
- Must be quart-sized (approximately 7×8 inches or 6×9 inches) to qualify for carry-on screening.TSA compliant
- This is the most important requirement for passing security.
- Waterproof – Since the bag holds liquids, waterproof material prevents leaks from damaging the rest of your luggage.
- Secure closure – Prefer smooth zippers or dual-track snap-seal closures. They are easy to use and provide a tight, reliable seal.
Why Brands Should Choose Custom TSA Quart Bags?
Custom-made TSA-compliant quart bags not only provide a more practical solution for storing liquids while traveling, but also enhance product differentiation and increase brand exposure by adding logos or graphic designs.
Boost Brand Exposure During Travel
People frequently use these bags in daily life and while traveling. Custom-made TSA-compliant quart bags with brand logos or designs are repeatedly visible, resulting in increased brand exposure.
Furthermore, compared to disposable bags, reusable quart bags not only help users organize essentials but also offer sustained exposure value and environmental benefits.
Suitable for:
- Travel Brands
- Airlines
- Hotels,
- Beauty and Skincare Companies
- Corporate Promotional Campaigns
Provide a Practical Solution for Travel Liquids
TSA regulations require passengers to carry liquids, gels, and aerosols in transparent, resealable quart bags when flying.
By choosing custom-made TSA-compliant quart bags, brands can provide consumers with a practical product that solves the real-world liquid storage challenges of travel. Advantages include:
- Easily organize toiletries and cosmetics
- Faster airport security checks
- Prevent liquid leaks
- Convenient travel packing
Enhanced Brand Differentiation
Bag manufacturers offer a variety of quart bag customization options to help brands create unique and more competitive products.
Brands can choose from:
- Custom colors
- Logo printing
- Sealing methods (zipper, resealable strip, slide lock)
- Premium materials
- Custom packaging
Travel and lifestyle brands can choose customized premium TPU quart bags instead of ordinary plastic bags to ensure durability.
Supporting Sustainable Brand Development
Consumers increasingly favor reusable and environmentally friendly bags. Standard quart bags made of TPU, PEVA, or renewable materials meet these preferences and comply with TSA regulations.
For brands focused on ESG (Environmental, Social, and Governance) and sustainable product development, reusable quart bags are an ideal choice.
Creating More Marketing Opportunities
Customized TSA standard quart bags are suitable not only for travel but also for various business uses.
Typical uses include:
- Travel gift sets
- Promotional gifts
- Gifts for trade shows and other business events
- Loyalty rewards for retail store members
- Storage bags for hotel or spa treatments
Custom Quart Size Bag: Design Considerations for Manufacturers
Besides paying attention to the size of the quart size bag, its sealing system and durability are also crucial.
Sealing System
TSA requirements stipulate that quart size bags must be resealable. To meet the requirement, high-quality quart size bags on the market often use double-sealed zipper tracks. It is not only durable and smooth to open and close, but also provides good sealing to prevent liquid leakage during flight.
Durability
Highly durable quart size bags can withstand repeated use and bumps and compression during transportation. Therefore, bag manufacturers often prioritize one-piece fabrics in their designs, minimizing seams. Additional material is added to reinforce key stress points to prevent tearing. The sealing system of quart size bags also undergoes over 50 opening and closing cycles to ensure smooth operation during repeated opening and closing.
Popular TSA Approved Quart Size Bags on the Market
If you’re unsure how to choose quart size bags from the market, here are some suggestions. You can consult their official websites or purchase directly from e-commerce platforms.
Brand | Product | Features |
Ziploc | Quart Zipper Food Storage Bag | Disposable, standard size, familiar to security personnel |
Sea to Summit | Travel Toiletry Bag | Clear and transparent, double-sealed zipper, with non-slip loop |
Kewei | Multi-Functional Toiletry Bag | Transparent material available, zipper seal, various styles, customization available |
Matador | Toiletry Case | Slim design, durable Cordura fabric, waterproof sealed compartment |
Peak Design | Wash Pouch | Durable, easy to clean, with modular compartments |
Quart Packaging Bag Design and Manufacturing Guidelines (For B2B Buyers)
Recommended Production Size
When mass-producing TSA approved quart size bags, Kewei suggests slightly reducing the size to maximize compliance with the TSA’s 3-1-1 standard and reduce unnecessary hassle for consumers during security checks.
- Safe Production Size: 6 inches x 9 inches
- Not exceeding: 7 inches x 8 inches
- Capacity Requirement: 1 quart
Use Transparent Materials
TSA regulations stipulate that quart size bags must allow clear visibility of the contents. When customizing, transparent PVC, PET, PEVA, or TPU materials with a transparency of 92% or higher are ideal choices. Additionally, a fabric thickness of 1-2 mm ensures both durability and a degree of softness for ease of use.
| Material | Transparency | Durability | Cost | Eco-Friendly |
| Polyethylene (PE) | High | Basic | Low | Limited |
| TPU | High | Excellent | Medium-High | Yes |
| PVC | High | Good | Low-Medium | No |
| PEVA | High | Good | Medium | Yes |
Label Tips
When customizing quart size bags, B2B buyers can request the manufacturer to print “TSA approved” and “7 inches x 8 inches” directly on the customquart size bags. Kewei’s retail clients have already verified that these labeled quart size bags effectively improve sales conversion rates. However, note that the TSA also stipulates that branding should be limited to the bottom 15% of the bag to ensure the contents are clearly visible.
Durability Testing
Quart size bags that meet TSA standards must be reusable. Therefore, choose custom bags with excellent durability whenever possible. You can determine its durability through the following tests:
- Zipper Test: The zipper remains effectively sealed after more than 50 cycles of opening and closing.
- Leak Test: Filled with liquid and held under pressure for 30 minutes without breaking.
- Temperature Range: Test material flexibility at temperatures from -29°C to 66°C.
- Seam Strength: Test the seam strength of the custom quart size bags using a professional microcomputer tensile testing machine.
Why Choose Kewei for Custom TSA Quart Size Bags?
With over 20 years of experience in bag customization and manufacturing, Kewei has helped more than 560 businesses—including personal care brands, travel brands, hotels, and retailers—create TSA-compliant, quart-sized bags.
Kewei offers:
- Custom quart-sized bags that meet TSA regulations
- Options for transparent PVC and TPU materials
- Customizable logo printing and closure methods
- OEM and ODM manufacturing services
- Low minimum order quantities (MOQs) starting at just 500 units
- Rapid sampling and production
- Professional quality control (QC) and export expertise
Whether you need:
- Promotional quart-sized bags
- Travel toiletry bag sets
- Branded transparent toiletry bags
Kewei can turn your ideas into reality.
How to Pack Your Carry-On Liquids in a Quart Size Bag?
Quart size bags have limited capacity, so it’s crucial to make full use of the space inside and pack efficiently.
For most people, the liquids they carry on their trips consist primarily of skincare products, shampoo, shower gel, or facial cleanser. These liquids can easily fit into a quart size bag. Here are two ways to do this:
Buy Travel-sized Items
Many toiletries and skincare products are available in travel sizes for easy portability, and they generally fit into a quart size bag.
Use Appropriately Sized Dispensers
If you prefer not to buy travel-sized liquids, you can purchase reusable travel dispensers that meet the 3.4-ounce capacity requirement. Then, fill the dispensers with your desired liquids, which will also fit into a quart size bag.
What Exceptions Does The TSA Have for Carry-on Liquids?
The TSA requires most carry-on liquids to adhere to the 3-1-1 rule. However, in some cases, some carry-on liquids can exceed 3.4 ounces, but they still need to undergo rigorous inspection. For example:
Infant Food
Infant formula, breast milk, juice, and pureed fruit can exceed 3.4 ounces.
Medical Medications
This includes liquid prescription medications, insulin or other injectable medications, as well as over-the-counter medications like cough syrup and ice spray. Cooling gel packs and liquid nutritional supplements can also exceed 3.4 ounces, but they must be separately declared and inspected by security personnel.
Liquids Purchased After Security Screening
Liquids, gels, or aerosols purchased at duty-free shops after security screening can be brought on board. If you are connecting, it is best to keep them unopened and place them in a transparent bag.
Other Countries Quart Size Bag Requirements
Different countries have different quart size bag requirements. Here are three:
EU
Similar to TSA regulations, the EU also requires that quart size bags must not exceed 100ml and must be placed in a single transparent bag no larger than 1L.
Australia
Australia also follows the 100ml/1L transparent bag rule, and the bag must be sealed.
China
China also follows the 100ml/1L transparent bag rule. Some security checkpoints may provide quart size bags, but it’s best to bring your own.
If you’re traveling with a quart size bag for your carry-on liquids, it’s best to place them on the top shelf of your travel bag for easy access at security. Also, before traveling, it’s best to check your luggage on the TSA website to avoid violating TSA regulations and potentially getting penalized or having your luggage abandoned. If you are looking for TSA approved custom quart size bags, please contact Kewei for the latest quote!
FAQ
F: What Tests are Typically Performed on quart size bags?
A: To ensure the performance of quart size bags and compliance with TSA 3-1-1 regulations, manufacturers usually use a series of tests on quart size bags. Key aspects include:
- The zipper system of the quart size bag undergoes over 50 opening and closing cycles to ensure a smooth finish;
- Injected air or liquid into the sealed quart size bag, and pressure is applied (simulating air pressure changes during flight), maintaining the pressure for a period before checking for leaks;
- The quart size bag fabric also undergoes tensile strength testing, which ensures it won’t burst when fully packed;
- Placing the quart size bag in high or low temperature environments, such as a temperature range of -20°F to 150°F, to test whether the material retains its flexibility.
F: What Factors Do Bag Manufacturers Consider When Designing Quart Size Bag?
A: Bag manufacturers need to strike a balance between compliance with TSA 3-1-1 regulations and consumer preferences when designing quart size bags. They typically consider the following factors:
- Compliance: First, the quart size bag must conform to the TSA’s 1-quart size requirement, be transparent, and have a resealable seal. It reduces unnecessary hassle during airport security checks and improves efficiency;
- Practicality: Good products should have a user-friendly design. For example, can it be used as a standalone module within the overall custom bag solution? Should hooks be added to the quart sized bag to keep it away from damp surfaces? Should the surface be treated with anti-static agents to reduce dust accumulation and maintain cleanliness?
- Durability: Does the fabric of quart size bag possess good tear and tensile strength? Can the sealing zipper withstand repeated opening and closing? Are the seams reinforced? These are all key factors ensuring the durability of quart-sized bags.
- Environmental friendliness: The quart size bag fabric is recyclable? Sustainable quart sized bag solutions align with current environmental principles and effectively enhance brand goodwill among consumers.
F: Why are transparent PVC toiletry bags so popular?
Transparent PVC bags are a classic choice for TSA-approved quart size bags, offering the following advantages:
- Durable
- Reusable
- Easy to clean
- Low cost
- Printable
