3d Printed Storage Jar Fly Trap

Here’s my fly trap made from a storage jar. Using a standard ‘Le Parfait’ style storage jar and a 3d printed lid I have replicated a fly trap design I had seen on Amazon.

• 1 or 1 1/2 liter storage jar.
• 3d Printed parts (see below).
• M8 x 60 nut and bolt (or coach bolt).
• Bait (preferably something smelly).
• Piece of wire if it is to be hung up.

The design was modeled using Tinkercad and is printed in two parts. The files can be downloaded from Thingiverse HERE.

I printed in Green PLA, for no other reason than I like green and PLA is easy to print with. Using Cura as the slicing software and the standard settings for generic PLA. On my CR10-s 3d printer total print time for both parts was about five and a half hours.

The Lid needs to be printed with support.

Taking the M8 x 60 nut and bolt assemble the 3d printed parts as per the photos.

If the fly trap is to be suspended then drill a 3 to 4 mm hole through the threaded end of the bolt after assembly.

Dismantle the glass lid from the storage jar and replace with the 3d printed one, I use the original rubber seal so that the odour attracts the flies to the the entrance holes and not the outside of the jar.

Because of the smell and hygiene issues I would only use these outside to catch the flies before they get to the house.

Open the jar and add a few bits of meat or fish, the smellier the better.

Add water to fill the jar to around a third full, replace the lid and hang or stand.

A bit gross, but the addition of a small amount of chicken poo or similar on the stem under the cover seems to add to the attraction.

The first one of these fly traps I hung in the tree in our courtyard.

I used some leftover cooked chicken as bait.

The flytrap took a couple of weeks to get going and really start filling up. I think the fact that I used cooked chicken as bait meant it took longer to start to smell (also the weather wasn't very warm).

After 3 weeks it looks like this! And is filling up by the day.

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