Technically it’s a 30-sided rhombic triacontahedron. Five of the sides are used for the base, leaving 25 compartments to stash your advent treats!

The snap mechanisms for the lids are designed to be snug, so you’ll have to pop them in and out a few times to smooth out the nubs and remove any imperfections. Use some sandpaper if you want them even looser, but make sure they don’t get loose enough to fall out inadvertently!

This model is compatible with the "Coronavirus Advent Calendar" found here: https://thangs.com/DaveMakesStuff/Coronavirus-Advent-Calendar-35493