Two-piece Uno card case. Can also be used as trays while playing cards (see photo). I added small detents in the top half so the case will stay closed. They are a little tight when first printed, but smooth out after a few open/close cycles.
I printed it in PLA, but any material will work. Do not use supports. The inlays in the top cover will not print correctly if supports are used.
The author remixed this model.
Increased the height of the case by 2mm to accommodate slightly taller card decks. I also added a second version of the top cover with a cutout to see the cards in it.