Is there really smoke?
Does smoke come out of an electronic cigarette?
Nearly. It looks like smoke (it's made from the same stuff as stage smoke), and you still get that kick in the back of your throat.
Crucially, though, there is no combustion - as, according to scientists, combustion is responsible for nearly all the harm caused by smoking. What's produced is water vapour, which is why regular users call it "vaping".
Above: Our e-cigarette being used in a production of Private Lives. Check out our user gallery for more images.