5 liter containers to which you add water to reach 5 gallons total. Ferment for 5 days, clear for 2, then bottle... according to the manufacturer (Youngs from England), "The wine is now ready to drink, but will improve if left in a cool dry place for a few weeks."
Sounds like an Orchard Breezin kit which are 5L of juice (edit: actually 5.4L), I think. At least they have the sweetener pack to hide flaws in the over concentrated concentrate. Good for what they are, but they sure aren't a higher end kit.