Toploader Card Storage Box.  Do you put your cards in the Toploader card sleeves?  If so this box will hold 10 - 15 toploader card sleeves.  Great way to protect your valuable collectors cards.  This was made with Fusion 360 and was printed on an Ender 3 Pro.  You can use whatever printer you have.  Settings are as follows…

Quality 0.2

Infill 20%

No rafts or supports needed to print.

There are two different STLs included on with finger grips and one without.  I find the grips to be helpful to pull the top off.