super simple hook for Bottle - Birdfeeder parametric

Just another Hook for Birdfeeder, but in a super simple Design.

Drill a hole (8mm) in the bottom of the bottle. Put one half of the hook and then the other. Wrap the shaft of the hook with some tape or string.

If it should be waterproof then hang everything on a newspaper and fill the gap between the hook and bottle with adhesive or sealant. Use what you have right there Mac Gyver
In OpenSCAD, you can easily change the size of the hook.