These are fantastic for craft tools and paint brushes.

There are two sets of pen pots, one circle shape and one square shape, three different sizes. The walls are 1mm thick and the smallest one will take approx 3 hours with a 0.3mm layer height.

These were created using the 3D Box Maker app
https://apps.apple.com/ca/app/3d-box-maker/id1607771697

These can be printed with any layer height, draft layer height of 0.24 or even 0.3mm will print faster