It's no secret that Juul has dominated the e-cigarette market over the past year, but just how much it has dominated is eye-popping. Convenience stores sport signs boasting they sell Juul devices and pods. The e-cigarette has become so popular it even has its own verb: "Juuling." The company, Juul Labs, is raising $1.2 billion, valuing the company at $15 billion, Bloomberg reported last week. The staggering valuation comes just one year after spinning out from parent company Pax Labs, which makes similar devices for cannabis, and three years since the Juul device was introduced.

Juul's dollar sales have skyrocketed 783 percent in the 52 weeks ended June 16, reaching $942.6 million, according to a Wells Fargo analysis of Nielsen data. The e-cigarette category as a whole grew 97 percent to $1.96 billion in the same period. Juul's sales surged 882 percent in the most recent four-week period, boosting its market share to 68 percent. That's up from 27 percent for the four weeks that ended Sept. 9, 2017, according Nielsen data Juul labs provided CNBC in October. To compare, the second-largest player, British American Tobacco, captured just 12 percent of dollar share in the most recent period.