Packing with one carry-on means that all your liquid items must fit inside a quart-sized bag. Not only that, but each item must be 3.4 ounces or smaller. They call this the 3-1-1 Liquids Rule. “Liquids, gels, aerosols, creams and pastes must be 3.4 ounces (100ml) or less per container; must be in 1 quart-sized,…