Adding another level to growlers. (For those who can fill any growler anywhere.) And if you want to create a history of different beers much like passing a book on from person to person and writing your name in it or putting a code on a dollar bill, then Journey Jug is up your alley.
You fill it and log it. Then pass the empty on. Or you fill it and pass it on to a friend with the instructions for them to do the same and then start tracking the progress. It will be interesting to see if this takes off.