Those look pretty nice, and they are definitely cheap enough, but I have a few small horn funnels that I already never use, and seem to mostly rely on hypodermic transfers when dealing in those small volumes!
Temu is good for things just as this.
Now that I’m a model steamer I’m always keeping my eye out at stores for stuff, I might find something and say “hey this will work great for XYZ.”
They aren't exact, but still pretty good at that price to sit on an SEL or Bowman ect as a replacement for a lost one.