I’ve found one thing for sale where it’s referred to as a conical beaker.
If you do a search for Antique Lab Beaker you will find several images just like the ones I have.
I use the same one, but from walmart. I think you can get them at Dollar Tree for a dollar.
Cool. I did let curiosity get the better of me and did a mix in the small one today. I won’t do it again because it clung to the inside too much. I mean there was still a couple of ml of juice in the thing when it quit dripping. But that pour spout was awesome.
I may sell these things. Looks like they bring decent money if you have the antique ones like I have.