can you still get them or do the normal storage items act as them obviously they seem to hold whatever you stick in them!

I don't think that containers have a weight, or item limit anymore because I stuffed like 3 full sets of daedric (yeah, I know, daedric is too common in OB) into a barrel, and I could still stuff a lot of other things inside of it too, So I don't think that there is an Overflow loot-bag in OB.

as i had the small shack in the imperial city as my only home for a long time, i stuffed like 300 items into my chest there. I don't think there is a limit.