A remix of CAD-Guy's stackable beer crates that holds CR2032s. It's shorter than the standard crate, but I left enough vertical space to support the “hand holds” such that I could still fit a finger through. 

Another CR2032 remix was made after I made this one but before I uploaded it (by Antimaterie) which also has inserts. I'd recommend that one over mine because the inserts seem pretty useful. I'm mostly uploading this so that the STL doesn't go to waste on my hard drive.