I have a well organised socket wrench box from Gedore. But you buy different additional sockets, for example a spark plug socket or an Allen wrench.  They lay loose in the box or are to big to fit. 

This simple organiser holds 10 small sockets and two large ones. 

11-08-2024 I added a new model for 12 small and 4 big sockets, 16 small and 6 large and 28 small and 10 large.

If you need another size just let me know and i will see if my generator can make one for you.