Pretty decent article, I had to chuckle at this line though:
"Some experts also worry that their availability online — where a user need only click a box saying he or she is 18 — could entice children and teens to try them. So could some of the flavors, such as piña colada and vanilla.
Many states have already regulated the sale of e-cigarettes to minors. "
An alcoholic beverage flavor might entice children, how ironic.
Of course I do know that one of the fast food joints (BK i think?) is selling some kind of pina colada drink, so I guess it's a mainstream flavor now as opposed to just the name of a cocktail, still made me chuckle though.