I picked up a bunch of old stuff at a recent auction and just yesterday got to the bottom of one box.
In the corner was a glass rod. About 12 inches long, about 1/3" OD. Rounded ends.
I cannot imagine that it would be a stirrer, but perhaps.
No matter what it is, it has some years on it.
If anyone wants it -- $9 shipped (US 48). More elsewhere, but basically shipping + $1 to $2. (Because calculating shipping is sometimes imprecise.)