I present you with 3 versions of a desk paper organiser.

They are all iterations of the same model. 

It started with the one which has solid bottom. I realised it was a bit more wasteful than it should be. That is why I reduced the bottom to 3 bars interconnecting the vertical walls. And to test the limits, I also created a super lightweight version, with pillars instead of sqares in the walls.

I recommend printing it with PLA, with at least 15% infill, using the gyroid pattern.

Let me know how it came out for you.