How are these Bag in a box things for beer? I’ve half-offered to do some brews for a friend’s stag do and the bottling will be the death of me (especially trying to find time to bottle as well as do my own brews with 2 small kids). I assume I’ll need to do cask style beers in it, which is fine. £13 for 3 20L bags and boxes from TDONline seems just what I would be looking for (i.e dirt cheap and holds a full brew)