Mini Mason Jar Fruit Fly Trap Lid, 3D Printed

Design preview. Rendered from the file, not a photo.

The maker says it fits: 2.1 inch mini mason jar. See the proof

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What it does

Fits 4oz mini mason jars so you can trap fruit flies without taking up counter space
Uses simple bait like apple cider vinegar or fruit so flies enter and can't escape
Close the lid and place in problem areas so you stop watching fruit flies multiply
3D printed on demand from the US, making your custom kitchen accessory ready when you need it

Stop fruit flies before they take over your kitchen. This trap lid works with your mini mason jar to catch them fast. Just add bait, close the lid, and place it where you see the bugs. They enter through the design but can't find their way out.

Put a little apple cider vinegar or a piece of fruit inside your 4oz jar, screw on this lid, and let it work. You can see exactly what you caught and empty it when done. The lid fits standard 2.1 inch openings on mini mason jars.

Your design ships 3D printed and ready to use, made in the USA. Compatible with Apple. Not affiliated with, endorsed by, or sponsored by Apple. Apple and its product names are trademarks of their respective owners.

1.7k downloads in the maker community. That is interest in the design on the site it came from, not our sales.

What it fits

The maker says it fits: 2.1 inch mini mason jar

That is the maker's word, not a fit we measured. Check the size below against your own.

2.1 inch mini mason jarFrom the maker's own listing title, checked 2026-08-13. See the original post

Brand names here only say what this part fits. We are not connected to those companies, and they did not make or check this part.

What you get

This design prints as one piece.
Nothing else to print or buy for this to work.

What it is made of

Designs like this print well in PLA. Compare the materials.

Printed plastic is strong for its size, but it is not metal. We have not load tested this design, so we do not publish a weight rating. Keep it out of a hot car and away from open flame.