Prints without supports & is designed for 0.4mm nozzle with 200um layer height.
5mm spherical magnets snap in (I use the flat side of a wrench to push them in). I measured my 5mm magnets as 4.9mm (from Aliexpress), so that's what I designed for.
The bins come in 1-, 2-, and 3-way compartments.
The author hasn't provided the model origin yet.