You can bring liquids, gels, and aerosols in containers of 3.4 ounces (100 milliliters) or less each in your carry-on bag when flying. All these containers must fit inside one clear, resealable quart-sized (about 32 ounces) plastic bag , and each passenger is allowed only one such bag. This is commonly known as the TSA 3-1-1 rule: 3.4-ounce containers, 1 quart-sized bag, 1 bag per passenger
. There is no strict limit on the number of 3.4-ounce containers you can bring, as long as they all fit in the quart-sized bag and it can be fully closed. Typically, this allows for about 6 to 9 small bottles depending on their shape and packing
. Exceptions exist for medically necessary liquids (such as prescription medications, baby formula, breast milk) which can be carried in larger quantities but must be declared at security and are subject to additional screening
. Liquids purchased after passing through airport security, including duty- free items, do not count toward the 3-1-1 limit and can be carried in larger amounts if kept in their sealed packaging with receipts
. In summary:
- Maximum container size: 3.4 ounces (100 ml)
- All containers must fit in one quart-sized clear bag
- One bag per passenger
- Exceptions for medically necessary liquids and airport/duty-free purchases
This rule applies primarily to carry-on luggage; larger liquid containers should be packed in checked baggage
