When I went visiting my dad in Maine, I drank bottled water, and when done, tossed in trash. Every morning, he'd pull the empties out of trash when I wasn't looking. Last day of my visit, I saw him pulling the empty bottles.. Didn't know there was a deposit on them in ME. I would have brought him a couple million of them from home had I known.
Yeah, Delaware had that for a while and you got 5 cents per bottle, up to $25 per day while it lasted. A lot of people supplemented their income collecting them and turning them in.