Biscuit tins were often modifed to form cookers, dump sand in then petrol and add match, while standing well back. There was an intresting episode of Ration Book Britian on Yeterday channel last night. Andy Robertshaw supplied details of improvised cokers and then presenter cooked a meal for some Chelsea Pensioners. One told a great story of an improvised stove in the desert. He was cooking pork chops, the flame from petrol is very difficult to see in sunlight. He added more fuel , and there was a hell of a bang and he was blown under a truck. He felt flesh and had red stuff running down his face! When pulled out he found himself coverd in fish and tomato sauce. The sides of the oven had bene built with Sardine Cans! Oh the pork chops survived and were very nice.