Liquids, Gels & Aerosols: TSA Rules for Carry-On Bags

TSA 3-1-1 rule explained. What liquids, gels, and aerosols you can bring through airport security in carry-on and checked bags.

The 3-1-1 Rule

  • 3.4 ounces (100ml) — maximum container size for carry-on liquids
  • 1 quart-sized bag — all liquid containers must fit in one clear, resealable bag
  • 1 bag per passenger — each traveler gets one liquids bag

Exceptions to the Liquids Rule

Medically necessary liquids, baby formula, breast milk, and medications in quantities exceeding 3.4 ounces are permitted but must be declared at the checkpoint.

Frequently Asked Questions

Can I bring a water bottle through TSA security?

Empty water bottles are allowed through TSA security checkpoints. You can fill them at water fountains or bottle-filling stations after clearing security.

Does toothpaste count as a liquid for TSA?

Yes, toothpaste is classified as a paste and falls under the TSA 3-1-1 liquids rule. It must be in a container of 3.4 ounces (100ml) or less.

Can I bring shampoo on a plane in my carry-on?

Shampoo is allowed if it's in a container of 3.4 ounces (100ml) or less and fits in your quart-sized liquids bag. Solid shampoo bars are not subject to liquid rules.

Is deodorant a liquid according to TSA?

Gel, spray, and roll-on deodorants are classified as liquids and must follow the 3-1-1 rule. Solid stick deodorant is not considered a liquid.

Can I bring contact lens solution through airport security?

Yes. Contact lens solution is considered a medically necessary liquid and may exceed the 3.4-ounce limit. Declare it to a TSA officer at the checkpoint.

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