The TSA Liquid Limit Has Exceptions

Travelers have long been accustomed to packing liquids in their carry-on bags according to the TSA liquid limit, also known as the 3-1-1 rule. Created by explosive experts after a thwarted plot to explode planes flying from the UK to the US, the international guideline requires airline passengers to pack liquids inside 3.4-ounce containers—or 100 mL as most international products are marked—into one clear, quart-size bag.

While commonly referred to as “liquids,” these regulated substances are technically known as LAGs, an abbreviation for liquids, aerosols, and gels. This category also encompasses creams or pastes—essentially anything that can be passed through with a butter knife—from common travel necessities like shampoo, face wash, and sunscreen; to toothpaste, hairspray, and even peanut butter. Larger liquids can still be brought along on your travels but must be packed in checked luggage.

Exceptions to the TSA Liquid Limit

There are exceptions to every rule. Certain items are allowed through airport security in the US, provided they meet specific requirements and are properly declared to security officers. Here are 10 common full-size liquids you can actually take through airport security in the US.

Prescription Liquids, Gels, and Aerosols

Medication prescribed specifically for you is perhaps the most common item that qualifies as an exception. TSA recommends that it’s clearly labeled so there is no question about what’s inside. Depending on the situation, medication may be screened visually or with an X-ray machine and may also be tested for traces of explosives. When the officers are not able to properly screen the item, you may be asked to open the container for a vapor analysis.

In cases where you would like to make sure the medication isn’t opened or X-rayed, simply inform the TSA officer. Additional steps will be taken to clear the liquid, and you or the traveling guardian will undergo additional screening procedures, which may include AIT screening, a pat-down, and screening of your carry-on property.

Other Exceptions

• • Liquid medications and contact lens solution: Larger amounts of medically necessary liquids, gels, and aerosols in reasonable quantities for your trip.
• • Cooling accessories: Gel ice and freezer packs are permitted, as long as they are frozen solid when they pass through security.
• • Breast milk and infant formula: Passengers traveling with infants have enough to worry about on their flights—and being able to provide the little ones with the proper nourishment should not be one of those concerns.
• • Baby and toddler food and drinks: Food and drinks for babies and toddlers are allowed, including juices and puree pouches, as they too technically fall into the “medically necessary” category.
• • Non-spillable wet batteries: Certain portable electronic devices may need non-spillable batteries with absorbed electrolyte.
• • Fresh eggs: Even with liquid yolks, they can be taken through security but may need to be removed from the carry-on bag for proper inspection.
• • Live fish and coral in water: Assuming your live fish and live coral in water need more than 3.4 ounces of water to survive, these are more exceptions to the rule.
• • Biological specimens: Liquid exceptions can be made for these items as well, provided they meet specific requirements and are properly declared to security officers.

As more airports become equipped with advanced CT scanners that use 3-D imaging to detect hazardous liquids, the liquid limit rule could be scrapped entirely. In the United States, the TSA tells Condé Nast Traveler they “anticipate the limit on liquids will be lifted in the coming years,” while airports nationwide are already quietly phasing out long-held liquid rules.

While screening and technologies vary at every airport, so, for now, the TSA liquid limit remains in effect. However, by being aware of these exceptions, you can better plan your travels and avoid any potential issues at airport security checkpoints.