So do I and add aluminium to the list as well. Once I have accumulated a crate or two full I'll take it down the scrappy. Not worth doing unless you have that sort of quantity though.
Ali drinks cans can be quite profitable, big bag (2' dia 3'high volume of crushed cans is worth a few tens of pounds so if you haven't got to drive far it's enough for quite a few beers.
Yep a crate at the back of the garage for the scrap as and when it appears. When they get full do something about it, just as easy to throw the scrap in that bin as the real one.