Experimental cube mail based on interlocking cubes instead of interlocking chains. I'm going to try to print it soon at low detail without any supports in the hope that it will fuse together and I can break it apart after it finishes printing.

EDIT- It works! I've attached two more pictures of it bending a bit. You do have to break it apart and the bottom layer gets all wacky when printing without supports. I think removing the top layer might make it a little more fun to use (due to increased flexibility).

EDIT- I'm posting an updated version of this design on my new account, @Rachmanin0xFF -- head over there for more cool stuff in the future!

Done in blender with a lot of copy-pasting.