Never had an issue with my ego and juices, but recently got a Provari. More worried about the batteries, isn't there some regulation on the number and/or size of rechargeable batteries you can take.
You have to keep spare batteries contained and not loose. Those are new TSA rules. Batteries can explode with pressure and pressure changes. I wrapped mine in a laptop battery bubble wrap bag that has a foil coating and tough plastic coating on top of that. I kept them in a plastic box inside the bag, but that may be overkill.
"As of January 1, 2008, the Department of Transportation (DOT) through the Pipeline and Hazardous Materials Safety Administration (PHMSA) no longer allows loose lithium batteries in checked baggage."
"Keep batteries and equipment with you, or in carry-on baggage - not in your checked baggage! In the cabin, flight crew can better monitor conditions, and have access to the batteries or device if a fire does occur."
"Effective January 1, 2008, you may not pack spare lithium batteries in your checked baggage. You may pack spare lithium batteries in your carry-on baggage. Please see our Spare Battery Tips and How-To sections to find out how to pack spare batteries safely! If you pack a device containing batteries, secure it against activation by locking the activation switch in the "off" position, placing the device in a protective case, or by other appropriate measures."
"Place each battery in its own protective case, plastic bag, or package, or place tape across the battery's contacts to isolate terminals. Isolating terminals prevents short-circuiting."
"E-Cigarettes are becoming more and more popular and I’m happy to report that TSA has no problem with e-cigs being packed in your carry-on or checked bags. Now as far as using them on a flight, I would suggest you contact your airline and see what they have to say. And, while not recommended by 9 out of 10 dentists, candy cigarettes are permissible as well."
"TSA has and will continue to work closely with the FAA on potential aviation safety and security issues, and TSA security officers are thoroughly and continually trained to find explosive threats. TSA does not have plans to change security regulations for electronic devices powered by lithium batteries."