You can usually bring liquids in containers up to 3.4 ounces (100 ml) each in your carry‑on, and all of them together must fit into one clear quart‑size bag. Larger liquid containers generally have to go in checked baggage unless they fall under special exceptions like medicine or baby items.

Core rule: how many ounces?

  • Most airports and the TSA follow the “3‑1‑1” rule for carry‑ons:
    • Up to 3.4 oz (100 ml) per container.
* All those containers must fit in **1** clear, resealable **quart‑size** bag (about 1 liter total volume).

* You get **1** such bag per passenger.
  • In practice, this is usually around 7–8 travel‑size bottles (3–3.4 oz each) before the bag won’t seal.

So if you’re asking “how many oz of liquid can I take on a plane” for your carry‑on, think: lots of small bottles (max 3.4 oz each) that together fit in a 1‑quart bag, not one big bottle.

What counts as a “liquid”?

Security rules treat many everyday items as liquids or gels if they can be squeezed, spread, sprayed, pumped, or poured. Common examples:

  • Drinks: water, juice, soda, alcohol (within allowed limits)
  • Toiletries: shampoo, conditioner, lotion, sunscreen, toothpaste, mouthwash, hair gel, deodorant gel
  • Makeup: liquid foundation, mascara, lip gloss
  • Foods: yogurt, peanut butter, sauces, soups

All of those must follow the 3.4 oz + quart‑bag rule in your carry‑on, unless they’re in checked luggage.

Important exceptions

Some items can exceed 3.4 oz in carry‑on if declared and screened separately.

  • Baby items: breast milk, formula, baby food, sterilized water “as much as needed” for the journey.
  • Medically necessary liquids: certain prescriptions, liquid medicines, special‑diet foods.
  • Duty‑free: liquids bought after security (like perfume or liquor) can be over 3.4 oz if kept in the sealed duty‑free packaging.

These might still be inspected, but they are not bound by the 3.4 oz per container limit.

Quick planning tips

  • Put anything larger than 3.4 oz (shampoo, big lotions, full‑size perfume) in checked baggage if possible.
  • Use several small 2–3 oz travel bottles instead of one big container.
  • Keep your quart bag easy to pull out at security so you don’t hold up the line.
  • Check your departure airport’s latest rules, because a few places are testing new scanners and may relax the 100 ml limit, while most still enforce it strictly.

Bottom line: in your carry‑on, think “small bottles (max 3.4 oz) + one quart‑size bag,” and use checked luggage or duty‑free for anything bigger.

Information gathered from public forums or data available on the internet and portrayed here.