A bird feeder in the form of a cap for a pet bottle. Fits most pet bottles with a 28mm thread. It consists of three parts. Basket, slotted divider and threaded top cover. It is best to use four M3x10 screws to attach the top cover. I made a feeder from PLA and it works great.
If someone plans to use it in the summer, it would be better to make it from PETG.