Saw the original and tried it out. Flies went in, but were also getting out. I recreated the thing in Fusion based…
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updated September 2, 2021

Model files

Mason_Jar_Fly_Trap_v1.stl
Mason_Jar_Fly_Trap_v1.stl
220 kB  |  September 2, 2021

Model origin

The author marked this model as their own original creation. Imported from Thingiverse.

License