Fly Trap for hornets, house flies and fruit flies.

thingiverse

A fly trap that is customizable for any bottle or cone size. I used a Gatorade bottle but you can easily change the $rim variable to any size. You can change the parameters for cone size, hole opening and small hole along with rim size and thread size. It does not make a thread but two nibs to catch the threads. Included is a 7mm version for hornets or house flies and a 2mm version for fruit flies along with the openSCAD file.