LeBurns - no, that's the issue; you can't really mark items as "junk" in D:OS. There is the semi-workaround Raze described where you can pick up a barrel (or a crate, chest, etc. - assuming you're strong enough!) and put up to 20 items into it manually. But there's no real "junk bag" feature. As others mentioned though, containers (especially the lighter ones) can at least be useful for sorting items you want to keep.