Had a lovely day charity shopping for glass with a friend a couple of days ago, but didn't find much except ..... Well, what IS this?
I thought it was a duck shaped jelly mould, and bought it as such thinking it would amuse the grandchildren. However, when I got it home, youngest son declared, "That's not a jelly mould!" He says he has no idea exactly what it is, but is sure it isn't a jelly mould!
Discussions (not arguments - no, never!

) have continued amongst family members, and views vary from jelly mould, to terrine mould, to pate mould - a mould seems to be the one thing we do all agree on!
What do folks here think? And what sort of age might it be? Modern(ish) or old? It's a thick sort of pyrex-type glass, but has no makers marks anywhere.