The file 'Bird Feeder Bottle Cap 3D Printer Model' is (SLDPRT,STL) file type, size is 13.5MB.
I saw a picture of a similar design somewhere here a few days ago (https://www.thingiverse.com/thing:2883603). I quite liked it, but I had to adapt it to a bottle that was available to me in Germany.
The bottle you use should have a diameter of 37 mm around the outer part of the thread.
I also provided the same thread, but without the rest of the part, so you can test if it fits onto your bottle.
Edit: I have also added a Version with larger Holes for the Seeds in it because Sunflowerseeds (Sonnenblumenkerne in german) got stuck a little bit in the current Version. This I am still tinkering with a bit.
Have fun with it :)
Vogelhaus_Flasche.SLDPRT | 1.2MB | |
Vogelhaus_Flasche.STL | 14.9MB | |
Vogelhaus_Flasche_Sonnenblumenkerne.STL | 14.0MB | |
Vogelhaus_Flasche_test.SLDPRT | 363.1KB | |
Vogelhaus_Flasche_test.STL | 1.1MB |