You can only bring small containers in your carry-on, and the key rule is the “3-1-1” liquids rule for most flights in 2026.

Quick Scoop: Basic Limit

  • Each liquid, gel, cream, paste, or aerosol in your carry-on must be in a container no larger than 3.4 fluid ounces (100 ml).
  • All those containers must fit in one clear, quart-sized (about 1 liter) resealable plastic bag.
  • You’re allowed one quart-sized bag per person in your carry-on.

In practice, that usually means:

  • Roughly 6–9 travel-size bottles (3–3.4 oz each, or some smaller ones mixed in) can fit in a quart bag, depending on their shape.
  • The bag must be able to zip or seal completely ; if it won’t close, security can make you remove items.

So there isn’t a strict total “number of fluid ounces” written into the rule, but in reality you end up around 25 fl oz (about 0.75 L) total in that one quart bag when it’s reasonably full.

Important Exceptions (Still Allowed)

Some items can go over 3.4 oz in your carry-on when they’re screened separately, such as:

  • Medically necessary liquids (like liquid medications, some medical nutrition)
  • Baby formula, breast milk, and baby food for an infant traveling with you
  • Certain specialty items (like some medical or disability-related liquids)

These do not have to fit in your quart bag, but you must declare them at security and they may be screened more carefully.

What About Checked Bags?

  • In checked luggage , typical toiletries and liquids are not limited to 3.4 oz containers , and you can pack full-size bottles as long as they’re allowed items (e.g., not flammable beyond airline limits).
  • Always tighten caps and put liquids in sealed bags to avoid leaks during the flight.

Quick Example

If you’re packing carry-on only and wondering “how many fluid ounces can I take on a plane?” under the standard rule, think of it this way:

  • Up to 3.4 fl oz per container ,
  • As many of those small containers as you can fit in one quart-sized clear bag (usually around 25 total fl oz worth of small bottles),
  • Plus any approved exceptions (like meds or baby items) declared separately.

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