They were nasty but consider this there was a time before the crusader mug and boil in the bag.. That time involved a plastic 58 pattern mug, rations in tins ( mmmm bacon burgers and baby's head) and the use of 2 mess tins.... if you were an uber ally 'old sweat' you probably had a 44 pattern mug with a rim of black nasty.
You forgot Cheese Possessed