What is the 3-1-1 rule?

Each passenger may carry liquids, gels, and aerosols in travel-size containers that are 3.4 ounces or100 milliliters. Each passenger is limited to one quart-size bag of liquids, gels, and aerosols. Common travel items that must comply with the 3-1-1 liquids rule include toothpaste, shampoo, conditioner, mouthwash, and lotion.

Any liquid, aerosol, gel, cream, or paste that causes concern during screening will require additional screening.