(CJ120) A handy way to ferment your wine, or to store it efficiently in a small space. Don`t have enough wine to fill the jug completely, no problem. Just burp out any excess air by collapsing the container . These polyethylene tanks come complete with 38mm solid screw caps. See our Adapter Screw Cap for a slick way of attaching our Senior Air Lock or use a size 6-1/2 rubber stopper. (all sold separately)