Vaporized nicotine with tobacco flavoring. Many look like cigs. There's adds for them at the top of these forums. Or you could google it.
er i didnt really put it together (e cig.. electronic cig) i was going to buy one when i smoked cigarettes... but i just stopped smoking. itdbe greate to get an e cig and fill it with soem sort of cannabis extract ps. dont forget that youre gettin all the nicotine which is not harmless even in an e cig