Tub lid fruit fly trap

thingiverse

Fruit fly trap lid that can be put onto yogurt tubs and take-out soup tubs. The fruit flies can go in but can't find their way out. Put apple cider vinegar and a few drops of dish soap in the tub then install the lid. You may need to adjust the size of the lid some as this fits a little too tightly (and may not come off easily). No supports needed, at least on my Prusa i3 MK3.