I've always liked the idea of smoke appearing in a covered glass , but didn't like the methods.
Have there been any innovations with this new vapor cigarette technology?

I'm sure I've seen something like that. Will have a look. On a similar note, the effect where real smoke is blown into a wine glass, settles like liquid, and is poured into another glass is incredible, and totally underused! Paul xenon used it in trick or treat tv show. It's so easy to do, but doesn't look that way! Great impromptu bit that kills!
In fact if anyone here hasn't seen it, then let me know and I'll video and link it. I'd love you all to see it!
K

Is the question "Are there improved methods for producing smoke with the e-cig tech" or "Are the better method for getting smoke into glass?"

I'm interested in any method not using chemicals. Just mentioned the e cig an example.