Many states do have mandatory deposits on drink bottles and cans.........................
We do here in Michigan. I think the deposit law went into effect back in the 70's. Prior to that, parks and roads were littered with tossed out cans and bottles, now they're picked up by resourceful people.
At the park where I play softball in the morning during the summer, the dugouts are littered with the plastic water bottles from the games the night before while the beer and pop cans have been picked up and fished out of the garbage cans. There's an old retiree we often see riding thru the park on his bicycle checking out all the garbage barrels, picking out the cans and bottles.
Every ball diamond has garbage barrels but the people are too lazy to walk over the 10 feet and throw their plastic bottles away....