Bird feeder with a normal plastic bottle

I printed bird feeder from "gavinkennedy" but I want a few changes. So I made now version.

I optimized the amount of material, make smaller water drain hole at the bottom because the seed has passed through.
I also made a smaller roof, which is mainly for fashion accessories.
The hanging hook is screwed to the bottom of the bottle with a small screw.
I took small 0.5l coca cola bottle.

12.02.2019
I added coupler which he proposed and designed from Vijit. Thanks Vijit for a good improvement :)