I have kept these at home for a long time. The 5-go masu is an old one from the Showa era, and it's quite aged. There are scratches, stains, etc. It can hold 5 go of rice. The other 3 masu are from the late Showa era and are clean. The one with "Sho-Chiku-Bai" printed on it is a 1-go masu. Instant purchase is OK.