This is an updated of a model I made to go along Contemporary Dice Tower/Storage by dePrintinator. If you don't have his model already you should check it out. It's a nice design.

** This is just the tray, the tower it was designed for can be found here: 

Contemporary Dice Tower/Storage v2 by dePrintinator | Download free STL model | Printables.com

Based on feedback, I made a few adjustements. The main differences in this Dice Tray update are:

1. The walls are 1.5mm vs 1mm in the old model.
2. The tower sits lower to keep dice from bouncing out of the tray.
3. The fit of the tower is very snug now. Perhaps too snug for most printers. The old version was way too lose.  

** If you have trouble printing things with tight tolerances, you should consider printing it at 101% or more.