Bird feeder for large bottle

This bird feeder is based on the idea of [this design](http://www.thingiverse.com/thing:251085).

The original feeder has been made for normal soda (coke) bottle, having very narrow bottleneck, so the sunflower seeds are easily stuck in there. So I designed a new one for juice / ice tea bottles. No risk of bogging.

Glueing is needed to fix the frame internal ring to the main part. Any remix of a click-on (glueless) version is welcome :)

Use the adapter ring to attach a funnel half-bottle