Can I ask a silly question about PW's pukka version - when you say put it in a demijohn and bung it - are you talking about a solid bung or a winemaker's bung with the liquid to allow gases out? (My dad used to make wines, so I reckon I can filch a DJ, but he wouldn't want to see any of his collection disappearing even though they haven't been used in quite a few years, so can't ask aloud, and also can't ask in OH's presence or he'll be unhappy at "MORE CLUTTER" coming into the house!!).