Small storage box with size 8x8 cm and 5,5 cm height, or any dimensions you want. The Freecad model is parametric so you can change it to any size you want. Just change the parameters in the spreadsheet inside of Freecad.

The walls are thin (faster print) and the bottom is rounded slightly off so that it is easier to pick up screws etc. A box fits inside another box so that they don't take too much space when you want to store them without content (see picture).

Updated July 2023: added a lid that fits the 8x8 cm box.