This is a remix of a remix. Find the original remix here: https://www.thingiverse.com/thing:5565627
POmPuRiN remixed a Terraforming Mars cube holder, but it was too tight and fragile, so I removed some parts of the original lid. I also recommend to print top and bottom layers too. It won't be that pretty but it will be solid.
You need two both from the Box and the Lid.
The author remixed this model.