Two types of a rolling case, one uses a magnetic latch with 3mm* or 4mm* cylinder magnets. The other uses a plastic latch. I usually prefer to print these without a top layer so the infill is exposed on the top / inside, but it doesn't have to be printed that way.

Designs are customizable in Onshape if you need a particular size (magnetic version) (latched version). Different versions are mostly stored in branches.

Filaments: Cherry Red PLA, Transparent Emerald Green and Transparent Aqua PETG from Atomic Filament, Translucent Yellow PETG from Inland*, Transparent Green TPU from Sainsmart*

*affiliate link