50 years after Herbert Gilbert registered the "smokeless non-tobacco cigarette" in 1963, the vaping industry is smokin'! (See what we did there?)
"The e-cigarette market is valued at $2 billion, with the United States accounting for a quarter of all sales," CNN reported.
The growth happened fast. A June 2015 study found 10 percent of U.S. adults vape. "Vapers" say its a better choice than actual cigarettes. (Video via blu eCigs)
The effect of FDA regulations is unknown. But some predict they would decimate the vape industry.
"A 40 percent tax is going to kill small businesses. It's also going to kill the huge wholesalers that we have in the U.S. that employ a lot of people," one store owner told WPMT.
This video includes images from Getty Images.