CR 123 Battery Storage

Ive been wanting to store my CR123 batteries in my battery storage box but they're always flopping around in there. So my son and I came up with this design to use a D cell battery hole to store the CR123s. Works pretty good. Stl file provided.

Step 1:

My 10 year old son took all the measurements and designed this model in SolidWorks. We had to do one revision to make all the tolerances work just right.