Or the same when you returned your previous bottle or can while purchasing the next one. As a kid in Michigan during the late 70s, we scoured everywhere looking for cans we could return for the $0.10 (inflation adjusted $0.39 today) deposit. They were very difficult to find while they seemed to inhabit every ditch, roadside, and park in other states when visiting relatives. Obviously most cans were returned and the deposit refunded in Michigan. If you want to come up with a way of saying deposits increase the cost of the product, focus on the cost of administration for collecting and refunding deposits rather than the deposits themselves.