The following should be packed in a carry-on bag in case checked baggage is delayed, lost, or stolen: Drugs, in original labeled containers Extra eyeglasses or other corrective lenses (as well as a current written prescription for either) Hearing aid batteries The US Transportation Safety Administration (TSA) forbids carrying containers with > 90 mL of liquid or gel on a commercial flight, but the TSA allows larger amounts of medically necessary liquids, gels, and aerosols in reasonable quantities for the trip.