This is a fly trap that mounts to a 2-liter pop bottle. The flies go in and cannot find their way out.
There is also a fastener to allow you to mount this to a flat surface, for example a 5 gallon bucket. You would just need to drill a 1 1/8 inch hole in the lid to mount it.
I don't have instructions where to hang the trap and what goes in the bottle. This can be easily googled.
-- No supports needed.
-- Brim is optional
The author marked this model as their own original creation. Imported from Thingiverse.