A portable dice tower you can carry in your pocket, along with a set of 7 dice! And you can resize it to fit any dice. The lid just sort of snaps on for storage, and then you can grab the small edge to peel it back off. I carried this around in my pocket and it didn't pop open during my tests.
The included model is for 25mm max diameter (corner to corner) dice. It has fairly tight tolerances, and you may need to trim a little from the overhang bit on the lid to get it to close properly.
You can modify the models using Thingiverse Customizer (https://www.thingiverse.com/thing:6041896) or the included OpenSCAD file. You can adjust how large a die it can take, add extra height to the tower for more storage, and adjust tolerances to get everything to fit just right for your printer.
I did create this model from scratch to be parametric and to meet some of my needs, but the inspiration can be found here: https://www.thingiverse.com/thing:4571920