Baby Chamber Pot, Enamel, 22cm, Chamber Pot with Lid, (Stock) Omori I purchased this after struggling with toilet training, but it's unused. Reference Price: 20cm on Amazon is 6000 yen. (I bought this because I found that a larger size is easier to use based on online searches.) Enamel Chamber Pot Toilet Training Preschool Preparation Potty Training Chamber Pot Diapers Toilet Seat