Since I joined FC, and over the years, I had to study the various material properties (and their safety implications that we are not allowed to discuss in the product threads, surely to avoid much redundancy, even if I don't necessarily agree with that rule)
It's a fascinating subject, but somehow I wished it didn't become a requirement. Five years ago for instance, I never imagined I would have to worry whether say polyimide tape vapor was safe to inhale or not... But I digress.
The thing is, there's no magical material out there, they all have their short-comings. But from a health perspective, I didn't find anything that could beat glass. In fact, I didn't find any reported case of glass allergy (when all metals can be problematic, including the often labeled "bio-inert" Titanium, which a friend of mine unfortunately had his body reject the surgical implants he received after an accident)
The only theoretical concern we collectively identified on FC would be fine glass dust particles formation from the GonG joints grinding over time. And the proposed solution is to lubricate your joints, like they do with laboratory glassware.
But yeah, sorry my good man
@ataxian, the thing breaks, and way too easily sometimes...