Tui Feeder

Inspired by the Hummingbird Feeder, with a few changes.
Specifically;
Added a sealing lip to the bottom of the bottle thread
Changed the profile of the feeding tube so that no supports are needed and the cavity would be cleaner and not "stringy".
Made the perch, full circle.

Notes;
I sealed the feeder using thinned, water-based polyurethane enamel (I think that for FDM prints, the print will need to be sealed to prevent seepage/leakage). On my original design, the feeding tubes are quite small and it was difficult to coat and dry the enamel, the II version is basically the same, just with enlarged tubes for better coating/drying, and feeding. I tried the "hook" method of hanging but found that nothing sticks to PET bottles well, so I decided to mount onto my fence (40x25mm Al tubing), which works much better. I will try and see how well it works. If I get too many bugs, I was going to float a small polystyrene ball in each feeding tube to act as a valve.