This was a fun and fast DIY!
I took some air drying clay, rolled it quite thin with a rolling pin.
I used some tulle netting when I rolled the clay the last time, to get some structure.
I lay the sheet of clay around an empty washed jar.
I made sure the edges overlapped.
Then I stamped some ”holes” using a straw. I trimmed the edge on the top of the jar.
When the clay had dried, I glued some red string to the ”holes” and made a bow at the top.
The structure looks really nice in person. 
The little bullfinch likes his view! He can gaze out over all the Christmas loveliness that spreads out in our home these days.