Gizmojunk
Antediluvian as Feck
they were quick to return after the fall of NCR's coinage system because they were a known factor.
predicted that in a Post apocalyptic event there was a high chance bottle caps would be adopted as currency
You both don't think this a bit of a deus ex machina?
I believe that the reason for its use in FO3, is shameless 'mee-too-ism'; and that applies to a lot of things in FO3 besides the bottle caps.