A high-nicotine electronic cigarette called a Juul is sweeping across high schools and colleges as more and more youth experiment with vaping. One Juul pod contains the same amount of nicotine as a pack of cigarettes, according to Women’s Health.

Not only are Juul vaporizers small enough to fit in the palm of your hand, they can be charged when plugged into a laptop’s USB slot, making it easy for students to pass them off as flash drives in class.

The Juul vaping device was invented by two Stanford grads in 2007, and has since become the best-selling e-cigarette on the market, capturing 32 percent of the market share, according to Nielsen data.

Read more at www.womenshealthmag.com