I know there are much better (with threaded tops) traps out there but this was one of my first prints so I thought I'd throw it up. Basic fruit fly trap - works with most wide mouth canning jars in conjunction with the canning band. [EDIT} Ok so after employing my own trap two things became apparent to me:I have uploaded a new polygonal design that eliminates most of that surface area up top. I went with a polygon because it's a faster print for my machine (Micro 3D) and at the moment my machine doesn't like circles so much (backlash issues I have yet to solve). I do have a round version if you'd prefer that.