The Origin of the Deposit

So you know how some cans and bottles have the 5 cent deposit on them? Did you know that that was started to encourage people to pick up beer cans instead of littering them everywhere? 

I am sure that most of us collect our own cans and bottles at home to deposit because its easy and we want our money back. But do any of us still pick up littered cans and bottles when we see them? My parents have told me stories about when they were kids and would pick up the cans to get the deposit but I never hear about that anymore. Obviously you cannot return beer cans to the grocery store, but it is the same idea. Help keep our Earth clean and maybe make a few bucks doing it!