Quote Originally Posted by Sundowner View Post
I took a close look and this one seems to have a snap ring of sorts. The ring itself was slightly out of place, and when I carefully pushed at the out-of-place side it snapped back into position...but the glass is still loose. Hmm...perhaps diluted white glue, now?
Actually, in that case it sounds as though there is solid mechanical retention, so perhaps three or four tiny drops of white glue carefully applied with the end of a toothpick and evenly spaced around the circumference might be enough to keep the glass from rattling around. Using it thicker would reduce the chance of it flowing somewhere not desired. But like AgX, I'm not sure being absolutely tight is that critical, assuming there is no way for it to fall out.