This is a warmer for caring for your bottom using cotton and water. You can wet the cotton simply by pressing the pump-type water bottle with one hand. It is an essential item for gently caring for the delicate bottoms of babies prone to skin irritation. I used this for about six months a few years ago, and then cleaned and stored it. Since you only use cotton and water, you don't have to worry about chemical irritation, and it was very useful. There are no noticeable stains, but there is some discoloration due to aging. Since baby items are used for a short period of time, why not use used items effectively to reduce the financial burden? *Please note that even if you are asking questions or negotiating a price reduction, the person who proceeds with the purchase procedure first will be given priority due to the Mercari system. *Please refrain from making any claims or returns after purchase.