Just bought six 50 gallon plastic barrels to store animal feed in. Asked the guy delivering them about his source, business model. Turns out that (a) Greek olives are imported in them, (b) there's a scam involved - which is redundant, because "Greek")
It's not REALLY a deposit! No one expects the barrels back. They wouldn't even give you your money if you did return them. It's a paperwork lie to avoid taxes. Barrel + olives costs $1k. Period.