Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3186733.

Interesting fact, tampons are almost the same size as a AA battery. Not a user of them myself i was tasked with creating a case to hold 2 of the aforementioned. The premise being that they needed to fit into a purse/bag where a larger box would not venture easily, and individually they would be prone to damage.

So a repurposed AA battery holder is perfect size for a slim line, easy to carry tampon case.