13 Full-Size Liquids TSA Lets You Bring Through Airport Security
If you've ever stood in the airport security line, mentally calculating whether your shampoo bottle is under 3.4 ounces, you're not alone.
Most travelers are familiar with the TSA's 3-1-1 liquid rule: all liquids in your carry-on must be in containers of 3.4 ounces (100 milliliters) or smaller, and all those small bottles must fit inside a single quart-sized bag.
However, many people are unaware that the TSA makes exceptions for certain essential liquids, allowing you to bring full-size containers in your carry-on.
Here are 11 liquids you're absolutely allowed to bring through airport security in full-size containers.
1. Medications
If you take liquid medications, whether it's prescription cough syrup or an OTC allergy remedy, you're allowed to bring it in quantities larger than 3.4 ounces.
Pro Tip: It's helpful (but not required) to bring medications in their original, labeled containers and declare them upfront at security.
2. Baby Formula
Formula, toddler drinks, and even liquid baby food are all exempt from liquid limits. TSA understands that parents need full-sized supplies for little travelers.
3. Breast Milk
Breast milk gets special treatment at security checkpoints. It doesn't need to fit inside your liquids bag, and you're allowed to carry more than the usual size limit.
It's smart to tell a TSA agent before screening starts, especially if you're carrying larger quantities.
4. Juice for Infants and Toddlers
Bringing juice for your little one? No problem. TSA makes an exception for baby and toddler drinks, so pack what you need and just let an agent know at screening.
5. Liquid Nutritional Supplements
Got a meal replacement shake or liquid supplement you rely on? TSA allows full-size bottles for medical or dietary needs. No doctor’s note required. However, if you’re carrying a lot, having a note may speed things up.
6. Eye Drops
That little bottle of prescription eye drops? Totally allowed, even if it's more than 3.4 ounces. This applies to both prescription and over-the-counter eye treatments.
7. Hand Sanitizer
Thanks to ongoing health measures, the TSA still allows passengers to bring up to 12 ounces of hand sanitizer in their carry-on bags.
Just be aware that it will likely get pulled for extra screening since it exceeds the standard limit.
8. Saline Solution for Contact Lenses
Full-size bottles of saline solution for contacts are also TSA-approved for carry-on bags.
Again, it's considered a medical necessity, so size restrictions don't apply here.
9. Fresh Eggs
Yes, really. TSA permits travelers to bring fresh, uncooked eggs in carry-on bags without size limitations.
Pro Tip: Make sure they're packed securely to avoid a suitcase disaster.
10. Live Fish in Water
If you're traveling with a live fish (yes, that's a thing), TSA allows you to bring it onboard as long as it's in a clear, spill-proof container with water.
Expect some curious looks at security, but it's permitted.
11. Biological Specimens
For those in research, medical testing, or specialized industries, liquid biological specimens in properly labeled containers can travel in full-size quantities.
Please notify TSA officers before the screening begins.
12. Wet Batteries (For Medical Devices)
The TSA allows non-spillable wet batteries (often used in mobility devices and medical equipment) to pass through security.
Check with your airline if you're carrying large or multiple batteries.
13. Duty-Free Liquids (Sealed)
Suppose you purchase liquids like alcohol, perfume, or cosmetics at a duty-free shop past airport security. In that case, you're allowed to carry them onto your flight even if they exceed the 3.4-ounce limit.
Important: They must be sealed in a tamper-evident bag with a receipt inside.
What You Should Do at Screening
Always declare these liquids at the checkpoint before screening starts.
TSA may test, inspect, or ask questions, but they're not going to make you throw away your essential items.
You're not legally required to carry a doctor's note, but if you're carrying something unusual or a large quantity, having one can help avoid delays.
Final Takeaway
Don't assume every liquid in your bag is subject to the 3.4-ounce rule. If it's medically necessary for you, your baby, or your pet, the TSA has built-in exceptions to help you travel with the supplies you need.
Found this helpful? Save this article for your next trip and share it with your fellow travelers before they start tossing essentials at the security line.