Gridfinity audio cassette tape holder

Gridfinity compatible tape holder/organiser. 4 tape version is 2x3x2, 8 tape version is 4x3x2.

You can fit this, loaded with cassettes, into IKEA ALEX drawers.

Fair warning: I had some issues with warping when printing these, so a brim is possibly worth a try. The 8 tape version was more affected than the smaller one, and you don't really gain any extra storage from using the 8 tape version. The warping doesn't appear to affect their functionality, and is also not visible once the holder is in a grid.