I have struggled over the years with the best way to keep eyepieces handy AND clean. I prefer to keep the eyepieces in the screw bolt cases when not in use, so a means of storage was needed to accommodate this particular desire.
Here's the case in use. The box is a standard issue Ace Hardware toolbox with the tray removed. The eyepiece rack is made from 1/2" Baltic Birch plywood and finished with Polyurethane Spar Varnish.
The insert flips upside down for storage.
Here the eyepieces are stored in the screw bolt cases and stacked in the case for storage and transport.
For anyone interested I do make and sell these cases in three sizes. This is the medium case.