I do an alot of flying myself, and have never had an issue with juice bottles themselves (of all various sizes) or equipment itself. To be fair though on the equipment side of things I have always carried and used my old stick battery/carto setups in my pocket when working or traveling, so not real sure on that one. The only devices I've heard of issues are bottom feeders, and I think that has to do with the small capacity and the fact its an open system (the juice has somewhere to leak out of). Just leave a little headspace in your closed/sealed juice bottles and I would think you'd be ok.