I really like the little 1x1 case by @ftobler and printed a bunch of them. However, I couldn't resist making a few of my own tweaks to the design.
In addition I also made a few customized cases for SD cards, Micro SD cards, and mini 3DBenchys. The dual color lids are made using SVG files as modifiers.
I also wanted a heavier weighted base for these, so I made a 2x3 and 3x4 version. These are designed for 0.5oz wheel weights, don't forget to add a pause to insert them!
Everything should print fine with a 0.4mm nozzle, but I opted to use a 0.25mm for the crispest possible details. I recommend printing everything with PLA, except for the Latch Spring which should be PETG (I believe it will last longer). A piece of filament is used as a hinge pin for both the lid and the latch. I recommend putting a longer piece in and trimming to length with flush cutters.
The author remixed this model.
Shallower angle for easier overhangs. Added interior liner, magnets, and interlocking lid geometry. Also included larger weighted baseplates with magnets.