Marko Hörner shared on Thingiverse:

Flytrap for fruitfly PET screwable

Flytrap for catching fruit flies / vinegar fly / Cherry fruit flies to determine the altitude point / catch count .
Threaded fitting for PET Platikflaschen .
about half about 1/3 filled as bait the bottle with a mixture of unfiltered apple cider vinegar 2/3 and red wine .
The openings have to prevent 30 ° slope to the outside using the equipment outdoors ingress of rainwater . In addition, the holes are tapered to the invading fly to impede the escape inside.
At the top of the cap is a hole to attach a cord as a hanger .

Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

The Adafruit Learning System has dozens of great tools to get you well on your way to creating incredible works of engineering, interactive art, and design with your 3D printer! If you’ve made a cool project that combines 3D printing and electronics, be sure to let us know, and we’ll feature it here!