As of 2025, the standard TSA rule for liquids in carry-on bags in the United States remains the "3-1-1 rule":
- Each liquid container must be 3.4 ounces (100 milliliters) or less.
- All liquid containers must fit inside a single 1-quart (approximately 1-liter) clear resealable bag.
- Each passenger is allowed only one such bag of liquids.
- There is no specific limit on the total ounces if you fit them within the quart-sized bag, but practically this means about 7 to 8 containers of 3.4 ounces each, roughly about 25 to 27 ounces total.
Exceptions exist for items like medications, baby formula, breast milk, duty- free liquids, and other specific exemptions, which can be carried in larger quantities but must be declared.
Note: Some UK airports have introduced advanced 3D scanners allowing containers up to 2 liters each, but this is not the standard TSA rule for US flights.
In summary for typical TSA carry-on rules, the maximum size per liquid container is 3.4 ounces, with all containers fitting in one quart-sized clear bag, so total liquid ounces you can bring in a carry-on are about 25 to 27 ounces combined.
