The lids are removable, designed to keep the player pool in the lid and the general stock in the box, neatly separated during play. Also, you can have two stocks of resource tokens, one in the lid and one in the box.
They fit easily in the box, the pieces don't float all over the table during play and thay set up and pack away easily. The looks could probably be a bit more sexy, but they work.Picture here
I have a Powerpoint file if you like to fiddle with them. Just send me an email address.
Thanks to yipterence
for designing boxes like these in the first place.
Check also my boxes for the money