Replacing all the cardboard in the original container, this insert holds all the tiles without being inside the bag. I have included an open area under the tile floor of about 16mm for extra storage. 

Specifically, I wanted to include the MitchellHayes_394054's Qwirkle 5x5 grid system I love! A must have!  The grids lay underneath the tile insert. Flat and safe. 

The stands can be glued to the tile insert of the box. Your choice. I included holes around the edge of the tile insert to make it easier to remove the insert. The floor is 4mm thick, maybe a little thick but I wanted it to be tough. Dropping the wooden blocks in seemed to warrant the design. The puzzle connections are probably oversized. Again I was interested in strength. I used CA glue to lock the tile insert and stands as 1 unit. Though you may decide not to.. 

Enjoy!