The hand grenade was one of the most innovative weapons used in the First World War, with famous incarnations including the British ‘Mills Bomb’ grenade and German ‘Stick Bomb’. When these were not available, what did soldiers on all sides resort to?
Answer: Anything and everything. They often used “Jam-Tin” bombs, which were mere empty ration tins crammed with dynamite and scrap metal.
Source: World War One: A Political, Social and Military History by Spencer C. Tucker.