@kad2371 . . .
While I do not have an iCare there is a woman I see everyday who does use one and if "You" vape anything like she does - Let's just say EVERYONE will know what you are doing on those flights . . . Huge plume of Vapor . . .
. . . Now - When I was "flying" and NEEDED a HIT OF NICOTINE it wasn't really what equipment I using at the moment
(Although that doesn't mean Ya' still can use a HUGE MOD) - it was what "E-Liquid" I was vaping and how I was vaping . . . The main thing is that the "E-Liquid" can not have any after smell that a seat mate or flight attendant can smell - so it was usually just plain & simple flavorless "E-Liquid" with nicotine that I added a little "menthol/kolada" too . . . The other thing to do is make absolutely sure to take small little puffs and then "Exhale" any and all vapor that Ya' didn't swallow and/or hold on too into your shirt/blouse you are wearing . . . Almost as though you are being very courteous and coughing into yourself and not allowing the spray of a cough to spread to your seat meat or throughout the cabin . . . Even though there is more to say about "Stealth Vaping" on a plane - I think Ya' get the idea . . .

Just sayin' . . .