@vantablack might be tricky to find glow in the dark dyes that are safe for inhalation, but it would look pretty damn cool
@vantablack Yeah, making something phosphorescent and safe to breathe in might be a bit of an ask
Then you've got to light the stuff up, which is either putting LEDs in the vape to charge it or radioactive isotopes
The second idea is particularly bad
@troubleMoney the closest I've seen is this light-up tank https://www.smoktech.com/atomizer/tfv8-big-baby-light-edition