>At least in US airports, not only must all the liquids, gels, and aerosols be within 100ml containers, but these 100ml containers must all themselves be contai

>At least in US airports, not only must all the liquids, gels, and aerosols be within 100ml containers, but these 100ml containers must all themselves be contained in a single clear zip-top plastic bag per passenger of no more than 1 liter in volume. That's the theory. In practice, enforcement of the zip-top plastic bag rule is next to non-existent.