This trap can fit with plastic soda bottle. Fill the bottle with liquid bait, I'd recommend Autolysed protein bait. There are 3 versions you can choose, with and without fin. There is a hole for 3mm. string so you can hang the trap or you could put it on the flat ground.
This should print with yellow PETG or ABS as it use outdoor and the fruit flies are more attracted to yellow.
The author hasn't provided the model origin yet.