What Are Electronic Cigarettes

Electronic cigarettes are a new device for nicotine delivery that look and act much like a traditional tobacco cigarette.  Electronic cigarettes come in many forms, but the most common type is the 2-piece pictured below that features a battery and nicotine e cig cartridges:

At first glance, especially with the color scheme of this particular brand, it looks pretty much like a regular cigarette.  If you were to …