Laser cut project box, I have a lot of electronics projects, and this helps me to chuck all the newly bought parts in the appropriate project bin and keep them together (to prevent losing them and buying them twice). I have also included a clipboard, which I use as a cover, on top of the parts, and to keep track of the status (sometimes a project gets shelved for a while). Made from generic 4mm poplar plywood, glued together.

The rectangular cutout in the clipboard holds a 25mm binder clip, bit of a faff to fit, but at least you will not lose it.