U-Man – my prevailing thought is true glass. We could have a contest for plastic(s).
That’s one thing that I like about the farktography stuff is that it’s usually pretty straightforward on contest rules. I’m concerned that when this goes live, if there are interpretations of not-glass, it could turn into a trainwreck.
Of course, it’s not my contest, it’s yours. Have at it, good ladies and sirs.
I’ll actually be entering this one.