On Tuesday, after facing ongoing pressure from the US Food and Drug Administration (FDA), Juul announced that it would stop selling its flavored pods in stores in order to clamp down on teen vaping.

Juul launched in 2015, and within two years on the market, its popularity skyrocketed. Cofounders Adam Bowen and James Monsees were hoping to create a satisfying alternative to cigarettes for ...

And its nicotine pods came in tasty flavors like mango, cool mint, fruit medley, and crème brûlée. Juul quickly became popular with young consumers. At some point, "Juuling" even became a verb.

But in the US, Juul pods deliver more nicotine than many rival e-cigarette brands - a design the firm says was intended to help switch smokers to their products. That addictive quality is one ...