The 3-1-1 liquids rule, explained properly
Complete breakdown of the TSA 3-1-1 liquids rule: 100 ml (3.4 oz) containers, quart clear bag rules, medical exemptions, and international rules.
On this page · 4 sections
What actually counts as a liquid
The working definition at screening: if you can pour it, spread it, squeeze it, spray it, or smear it, it is a liquid. That sweeps in peanut butter, yogurt, hummus, salsa, mascara, lip gloss, toothpaste, gel deodorant, snow globes, and soft cheeses.
The exceptions worth memorizing
Medically necessary liquids, infant formula, and duty-free purchases in sealed STEBs are exempt from the 3.4 oz / 100 ml limit. Declare them to screeners before entering the X-ray queue.
Packing strategy
Pack your single quart clear bag at the very top of your carry-on for fast extraction at security checkpoint bins.
अक्सर पूछे जाने वाले प्रश्न (FAQ)
Frequently asked questions
Is deodorant a liquid for TSA?
Solid stick deodorant is not a liquid and flies unrestricted. Spray, gel, and roll-on deodorants are liquids and must be 3.4 oz (100 ml) or less in your quart bag.
Does mascara count as a liquid?
Yes. TSA treats mascara, lip gloss, liquid eyeliner, and cream cosmetics as liquids. Lipstick and solid balms are exempt.
Is the 3.4 oz limit per item or total?
Per container. Each bottle, tube, or jar must be 3.4 oz (100 ml) or less, and all of them together must fit inside your one quart-size bag.
What happens if my bottle is 3.5 oz but half empty?
It will be confiscated. The rule is about the printed container size, not the volume inside. A half-full 6 oz shampoo is non-compliant.