5 gal/20 Litre Diesel Tuff Jug Yellow with Yellow Ripper CapTuff Jugs come with the ripper cap system, a self regulating option which allows 20 litres of fuel to be dumped, no hassle, no spillage, in under a minute from a 20 litre container. Just lift the can (available in either 10 litre or 20 litre options), turn upside down and place firmly into the petrol tank. Pushing the Tuff Jug down opens the caps outlet and the internally fitted ventilation tube works in conjunction with the ripper cap to quickly and