More cities are joining a growing list of municipalities that are banning electronic cigarette sales to minors.
The suburban St. Louis city of Chesterfield was the latest to ban the vapor cigarettes Monday.
The question is, what exactly is in e-cigarettes, and should a child be able to buy them?
They're known for being packed with nicotine, but other ingredients are being introduced, too.
An entire industry has been built around the e-cig, and sales are totaling nearly $3 billion.
As suburban St. Louis communities are banning under 18 sales, ABC 17 asked if the Capital City and Columbia should be thinking about their own bans.
Joy Sweeney with the Council for Drug Free Youth said, "First of all, it's promoting smoking. It basically makes it seem like it's acceptable to youth because it's not quote on quote harmful. Among the youth that use e-cigarettes there is very little evidence that they don't smoke, and significant evidence to show that that leads to them smoking cigarettes in the future."
Officials in Jefferson City said they have not talked about the issue, but if the time comes they'll be open for discussion.