Personally I'd check some dumpsters behind these stores. I've been out dumpstering for a local charity, and I've seen a large amounts of milk crates in the dumpsters. Personally I wouldn't feel as bad about stealing milk cartons out of a dumpster. If you have any milk/juice distribution centers around you, they have a lot of them. Also you have a pretty good chance of snagging some juice that is still good. (the other day we found a whole pallet of perfectly good gatorade
)