The maximum amount of liquids, gels, and aerosols that can fit in a passenger's carry-on bag when flying is referred to as the "
carry-on liquid size." Typically, each container is only allowed to hold 3.4 ounces (100 milliliters), and all containers must fit inside a single, quart-sized clear bag. By imposing this limitation, the security checkpoint process will be streamlined and aviation security would be improved.
