Glasses temple tips, yep I chew these....Its a bad habit and it got so bad I had to do something about it. I designed this bright jazzy ear tips so I had some more material to chew on (PLA is supposed to be food safe, well better than the plastic originally on the glasses arm). Plus, printed in bright colours it's increases your chance of finding them on a desk of prototype junk!....Anyway this should be a good design option if you have those wiry type of eye glasses.

Almost forgot these versions are handed, with biased holes so they are a bit flatter next to the head...unsure it makes much difference