I have a simple system that comes in handy at the end of the hunt. What I do is place a 2 gallon ziplock inside a 2 gallon ziploc. The coins and good stuff go in the inside ziploc and trash goes in the outer ziploc bag. At the end of the hunt there is no more separating the coins from the aluminum cans and other trash. Cause there is at least one instance where I think I accidentally threw out a penny with the metal trash when I had them combined in the same bag.