The functionality of a cigarette or pipe is quite straightforward to understand. All you have to do is light a cigarette and inhale the smoke it produces. On the other hand, a vape pen is somewhat mysterious. Nevertheless, the way it works will not be complicated either. The difference between these units and the traditional units is that they’ve a heating factor instead of fire. Let’s discover out more. Basically, when the tobacco, dry herb, oil or wax heats up,…