Sake cups with storage bags used by the Imperial Japanese Army during WWII

These sake cups were used by soldiers in the Imperial Japanese Army during World War II. Such sake cups were commissioned by the soldiers themselves and each had its own colours and designs, such as the flag of Imperial Japan and a motif of an ammunition limber in this case. Some of these sake cups would also have the names of the owner and regiment inscribed, thus providing an insight into the background of the soldier who once drank a toast with these cups.