The use of a mechanical MOD (E-Cigarette) with a Rebuildable Atomizer (RBA) sometimes built Dual Coil. When used properly one can inhale from the MOD and exhale creating a cloud of water vapor covering a larger area then any other inhalant device.
"Dude I want that guys vape! He's taking small hits and blowing clouds effortlessly"
by Red_Suns_Kid July 23, 2013