As for the aged balsamic vinegar, DAW, I buy the cheap stuff and just let it sit on the shelf. In fact, lots of my groceries sit on the shelf.
Balsamic vinegar, like wine, will not age in glass, only in wood. The groceries, on the other hand, are not as fussy and, if not frozen, canned, or vacuum packed, will age just about anywhere.
der Brucer