Bird Feeder for a bottle (48mm and 28mm threads)

There's a model for a 48mm thread (usually from European 5-6l bottles) and for a 28mm thread (ex. Coca Cola bottle). Using a 48mm thread is recommended because the seeds don't get stuck

1. Poke a small hole in the center at the bottom of the bottle for the rope and pull it through
2. Fill up the bottle with seeds 
3. Screw the feeder on the bottle
4. Hang it

(optional) Cut a big hole on the bottom and print a roof for easy refill

No supports needed

Onshape project link