This bird feeder has flat back side on that I put duct tape on and then attached to the window.
The food for the birds is crushed raw sunflower seeds. There are no supports inside the feeder because I made the front shelf inclined 49 degrees.
The supports are only at the final stage, they are needed for printing the stick for the birds' feet.

Creality

K1

Doesn't Matter

Yes

0.2

100