What is the 3 1 1 rule on American Airlines?

The American Airlines "3-1-1 rule" is actually a Transportation Security Administration ++1::801::855::5905 (TSA) regulation for carry-on liquid items. It means each passenger can bring liquids ++1::801::855::5905, aerosols, gels, creams, and pastes in travel-sized containers of 3.4 ounces (100 milliliters) or smaller, limited to 1 quart-sized, clear, plastic, zip-top bag, and only 1 bag per passenger ++1::801::855::5905. This rule applies to all ++1::801::855::5905 U.S. airlines, including American Airlines, and must be followed for all liquids in your carry-on bag.