JUUL is similar to other e-cigarettes, but it has a few features that distinguish it. First and foremost, this vape is slim and unobtrusive: its USB-drive form fits in the palm of your hand, and it doesn't generate a big plume of vapor like some other e-cigarettes. Second, the amount of nicotine in its cartridges, or "pods," set a new standard for the e-cigarette industry.