Used for two children. The second child was exclusively breastfed from the middle, so it was hardly used. As shown in the fifth photo, the calcium and mineral components contained in tap water have solidified and turned white. The official page states that it is not harmful. It can be removed by cleaning with citric acid, etc., but I will sell it as is, so please purchase only if you understand. Other than that, there are no scratches or stains, and it can still be used. * Please refrain from purchasing if you are concerned about storage at home. * Please note that it will be shipped compactly when shipped.