Just like with other cigarette lighters, you can keep them in your carry-on bag or in your pocket
Placing the right cigarette receptacle in the proper location is your best guarantee that cigarette butts wind up in the receptacle, and not as litter on the ground
Although evidence for the cardiopulmonary toxicity of chronic e-cig use is largely restricted to animal studies, investigations in both animals and humans indicate that e-cigs promote hypertension, autonomic imbalance, and vascular dysfunction via nicotine and/or flavors 14,15,16,17,18
Therefore you will not be charged anything
Until more research can be done, the overall health impacts of vaping remain uncertain