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1-888-595-2181 A stricter norm exists for liquids, aerosols and gels on American Airlines. Commonly known as American Airlines 311 rule, it applies to all commodities which are not solid. A few examples of such items include deodorants, sprays, face wash gels etc. They will be allowed only if they are in 3.4 oz or 100 ml containers. Here are a couple of things you need to be aware of about 3.1.1.