THIS could be how you pour your moo juice...Wal-Mart is among some of the major chains converting to a new plastic jug.    The square jugs can be stacked more easily, minus the usual milk crates that hold the cartons of old.     That means less cost for daires: they don't have to buy the crates, for one thing.      Stacking the new jugs frees up space for...more jugs, meaning they can deliver more product in fewer trips.

        Word is, it comes with a pretty hefty learning curve--many complain about spills, especially when kids try mastering the new technology.        Have you encountered it yet?      Let me know what you think at mueller@620wtmj.com.