(AP) — A proposal to ban e-cigarette sales to minors in Nebraska is headed to a final vote in the Legislature.

Lawmakers gave the bill second-round approval on Thursday. The battery-powered devices give users a puff of vapor with nicotine, sometimes with flavors.

Minors who use e-cigarettes and stores that sell them to minors could face a misdemeanor charge for violating the law.

Sen. Russ Karpisek of Wilber, the bill sponsor, says there hasn’t been enough study to know if e-cigarettes are safe. Some lawmakers say they’ve heard from parents who might want to use e-cigarettes to help a child quit smoking.