As the Asian Hornet is spreading in our region we were looking for a trap that was fast and cheap to produce and distribute within our beekeeping association. I found these but they jars they were designed for are not that common here.
I also made a holder to allow for the jar to placed on its side or fixed to a post. I made these in wood with cnc, but they can also be printed.
Can be printed without supports
https://www.thingiverse.com/thing:5194652
https://cults3d.com/fr/mod%C3%A8le-3d/divers/piege-a-frelons-a-visser
The author remixed this model.