Yep, it's yet another battery box.

This one, however, is a super easy and low-filament print option when you don't need a lid and just want to store a stack of AA and AAA batteries as simply as possible in the least amount of space. Each box should be able to hold at least 48 batteries for those massive packs from Amazon and Costco.

In my sample picture, the AA box (PLA) and the AAA box (PETG) printed easily with default vase modes on printers other than my Bambu P1P, but if you want something stronger than vase mode, try adapting settings in slicing as mentioned in this video.