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According to the TSA regulations website below, you are allowed to bring liquids, gels or aerosols in a quantity no greater than 3.4 ounces each, with certain listed exceptions. Yes, they must be packed in one
, clear, quart sized ziploc bag only, and fold-over sandwich bags are not permitted. Basically, the limit would be as much as you can fit into that one ziploc bag, keeping in mind the no more than 3.4 oz. restriction per bottle/container. Please read more details, here: http://www.tsa.gov/311/311-carry-ons.shtm
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