I just answered a question on my youtube channel which was "what to say to people who ask you what you are smoking" The person who asked uses tanks like I do.
I replied that I say "I am not smoking. This (show the liquid in the tank) is glycerine which I am atomsing with this device which is my PA (personal atomiser) into vapour which I inhale. In no way is this dangerous to yourself."
I never call my device an "electronic cigarette" unless I am using an electronic cigarette.
I have usually called my device my PV - personal vapouriser - but I think PA - personal atomiser - sounds better? Very posh! Who doesn't want a PA - a personal assistant? Which it is too!