Weed box
thingiverse
I used Sketchup web version to design this but I am by no means a professional designer. All constructive feedback is very welcome! You'll need 8 6x3mm magnets. put a dab of superglue in each hole and drop in the magnets. Of course make sure that the poles of the magnets are correctly aligned so it will attract the lid instead of repel. Grinder size 55mm diameter.
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