Bottle Top Gnat Trap

thingiverse

I wanted something ridiculously simple and dirt-cheap that I could easily dispose of if I changed my mind. These should neatly stack together if necessary, and I'd like them to print without any supports or rafts. Simplify3D tells me that a fast-print of nine of these would cost just 79 cents, which works out to a mere 8.7 cents each. UPDATE 2017-03-05: I've uploaded a new version and run it through NetFab, tweaking the settings to get it to sit perfectly flat on the print bed. Hopefully this one will work a bit better. Instructions Add some vinegar, beer, banana peel, or any other tasty treat that fruit flies or gnats can't resist to a regular soda bottle. Screw this top onto the bottle tightly. Place the trap in the area where these pesky insects seem to be congregating. They'll be drawn in by the bait, fly right in, and unfortunately aren't clever enough to find their way back out - eventually they'll meet their demise.