>My refrigerator does not have any sort of retaining bar or what not to hold
>anything in the door.  It appears that there are slots for something to go in
>the door so that it can be used for storage.  If that is the case what do
>they look like and what sort of material is it?  I would like to fabricate
>some.

Whatever will fit and hold some drink cans, mustard etc.  I'm not
near mine right now, but I think it is a single piece of wire.