3-1-1 Rule means 3 ounces, 1 quart and 1 bag to carry on
Even though it's OK to carry on liquids, gels and aerosols, there are some very specific packing requirements put forth by the Transportation Security Administration.
The 3-1-1 Rule simply means 3 ounces, 1 quart and 1 bag for carry-on liquids. In other words:
- All liquids, gels and aerosols must be in three-ounce or smaller containers. Larger containers that are partially full or even rolled-up toothpaste tubes are not allowed.
- All liquids, gels and aerosols must be packed in a single, one-quart, zip-top, clear plastic bag.
- Larger bags or those that are not zip-top aren't allowed. Travelers may carry on only one plastic bag of liquids and/or gels and it must be inspected separately. Travelers should remove their quart-sized plastic bag from their carry-on luggage and place it on the conveyer belt for screening.
- There are exceptions for such essentials as baby formula and prescriptions. Larger amounts of liquids may be carried in your checked luggage.