TALLAHASSEE, Fla. -- They were first marketed as an alternative to smoking cigarettes.

But, now electronic cigarettes are getting into the hands of minors.

Jim Hampton owns Just VaPin' in Tallahassee. He said he's always stopped people under 18 from buying them.

"We believe in self-regulation," Hampton said. "Without a parent in the store and if they look under 18, we certainly will ask for an I.D. and if they don't produce one, we'll ask them to leave."

State lawmakers joined the fight to stop minors from using them.

Wednesday, they passed a bill banning the sale of e-cigs to minors.

"If you're under 18 years of age, you cannot have a vaporizing device and or an e-cigarette," said Rep. Frank Artiles, R-Miami, the sponsor of the bill.

The bill did ignite some criticism. People were worried about a provision restricting local governments from being able to control the devices themselves. But that item was amended out of the language on Tuesday.

"The locals had a problem with it. I believe that there has to be uniformity," Artiles said.

As for Hampton, he will continue to grow his business.

"For me, I haven't smoked in two years. I had a triple bypass at age 46 and this was the only thing to help me stop smoking."

According to the Centers for Disease Control and Prevention, the use of e-cigs middle and high school students in the U.S. has doubled in recent years.