If the item quality does not appear in any formula or provide any benefit, then the item shouldn't have a quality at all.
Examples are backpacks (bindle and sacks too), gloves, waterskin (flask and jugs too), and even weirder the crucible. Just make them like Coracle, which has no quality at all.
That way new players won't get confused and waste resources hoping to get something more out of a better quality item.