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The Transportation Security Administration (TSA) regulates the items allowed in carry-on and checked baggage. how many nips can you bring on a plane? According to the TSA guidelines, passengers are allowed to bring alcohol in their carry-on bags, as long as it meets certain requirements. Each passenger is generally permitted to carry a quart-sized bag with liquids, gels, and aerosols, each in containers of 3.4 ounces