6.4l drums at a good price on ebay at the moment
http://www.ebay.co.uk/itm/301526613927?_trksid=p2060778.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
http://www.ebay.co.uk/itm/301526613927?_trksid=p2060778.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT