Sarlacc Fruit Fly Trap


September 3, 2021

Fruit flies are annoying enough that I felt a 1000 year digesting period for them was fitting. So I came up with this variation on the standard fruit fly trap. The concept allows for endless fun/niche designs, leverages off existing jars, and the modularity allows top/trap changes as needed.

Invention idea #01142.1 pulled from my notebooks to share.

Build it for fun & profit.

Explore the interactive blueprint.

Click/Touch & drag to pan, Scroll wheel/pinch to zoom.

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Overview of the concept:

I thought this head would be nice on a fly trap for those LOTR / GOT people [Ref1]:

Additional Head Design Notes:

  • If you absolutely must build a Sarlacc version and don't fear a vicious M.M. attack, here's some reference pictures to get you started.
  • If you go the route of buying/modding an existing model there are many 3D model markets out there, and some free options such as Thingiverse and GRABCAD but do check licensing on them before proceeding.
  • If you prefer hiring you might try Fiverr. I've hired people there successfully.
  • The plate the head sits on should be thick enough for the screws. Perhaps 5-7mm or so.
  • For modding STL files I like to use either Meshmixer, OpenSCAD, or both.

I built a simple OpenSCAD file (attached below) to show the proof of concept and how I hack together STL's to pre-visualize a concept in this tool:

Hippo & Lid Models: [Ref2, Ref3]

I usually start with OpenSCAD if I want to rough something together. Often, I run around Thingiverse or GRABCAD to find the bits I need and mod them to fit my concept. From there, if I plan to go from concept to prototype I either stay in OpenSCAD if the geometry is simple and the target is 3D printing, or use Fusion 360 to create a solid model so I have the option to go with mold injection in the future.

Additional Notes on Recipe Book:

I said "book" in the audio commentary, but really I should have said "notecard". You probably only need bate recipes for the typical four flying pests: fruit flies, mosquitos, flies, wasps. Slipping in an additional page or card of some sort with DIY bate instructions would be a nice touch with the cone trap sets.

Additional Cone Trap Notes:

  • The cone lip should be thin, 1.5mm or less. 
  • The screws should reside inside the jar. That is, they should clear the inside jar edge.
  • I prefer heat inserts and machine screws, but this complicates production. Thread cutting screws are a good bet if you want to avoid said complication. I'd probably start with an M2.5.

Reference Links:


  • "sfft-poc.stl" is licensed under CC BY-SA 4.0.
  • "sfft-poc.scad" is licensed under CC BY-SA 4.0.
  • "hippo.stl" by bs3 is licensed under CC-BY-NC 4.0
  • "lid.stl" by lizard00 is licensed under CC-BY 4.0

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