Yes, they are one gallon jugs, 100% from concentrate, and their brand. They still have the 3 qt. jugs in the normal location, but the gallon jugs are on the end of the isle where they place the items on sale. I'm not sure how long they may last, as I've seen the "pile" get progressively smaller over the last several weeks.
I've used their brand for Apfelwein before and it works just as well as any other brand I've used. And that's 45 gallons of Apfelwien...my friends can't get enough!