This is a 2-piece version of the already-popular Modular Dice Tower (which has a lot more pieces that are compatible with this one):

http://www.thingiverse.com/thing:1010113

A few major differences:

1. The Base and Tray have been combined into one so they print as a single piece.
2. The Baffles and Battlement segments are fused into one.
3. The battlement notches have been removed to allow for upside-down printing.
4. There are no more windows (so ignore that aspect of a couple of the images above)

If you found this useful, please share and be sure to peruse my other submissions which are almost as varied as they are many:

http://www.thingiverse.com/3E8/designs

Enjoy!

May 18th, 2017 update: Added BattBaff0pt1.stl for higher resolution printers (like the Fortus 250 that I use at work). Print the base tray with the same printer and they'll fit perfectly together. Yes, I think of these things. You're welcome. :)