fruit fly trap

thingiverse

Thanks to Motsie for originating this design. I modified it to make it printable without supports. Begin with the larger side, and it should turn out just fine. The wall thickness is approximately 0.7 mm. With a 0.4 mm nozzle, you can print two parallel lines in each layer quickly and use less material. Update: I added a skirt to this design. It helps keep the part attached to the print bed and prevents the trap from shifting sideways on the glass.