I put mine on a lanyard or in my shirt pocket while on the plane and thru security, and use it in the airport bar area...and put my juice, bottles, and T3's, CE4's, chargers, etc and carrying case in my carry on bag....U are not allowed to vape on the plane but can carry it in your shirt or anyplace ya want..
carry on juice is limited to 100 ML total...and put the bottles in a plastic bag and take bag out of carry on and into tray with your shoes etc.. when going through security detectors..