Yep, it's just another battery box for LR44 coin cells. There's a boatload out there, but this is mine.
I needed a little box that could hold 30 cells specifically, so I made this.

Does it have something revolutionary that other holders don't? I certainly don't think so.
Should you use it over another organize? I can't tell you that, you do you.

Oh and tolerances should be tight enough for cells to stay inside even when you flip it upside down, but enough of them is exposed that you can relatively easily extract them nonetheless.

P.S. Yes, I realize the model is upside down, just give it a nice 180° rotation before printing. No support required.