I tried it once, but it didn't work well. In the end, I bought an electric one and didn't use this. Although there are no visible stains, I'm listing it as used since I have used it. The outer box is a little dirty, but I will fold it and send it if you need it. ---------Product Description--------- A nasal aspirator with a vacuum pump structure that can firmly suction nasal mucus, yet is quiet with no operating noise that babies dislike. All parts can be stored, and it can be used anytime, anywhere. --------------------------- To avoid disappointment... Please be sure to comment with any questions you have beforehand! ☆ We will ship via Mercari's anonymous delivery service for peace of mind. It will be posted as early as the next day. ※ If you are in a hurry, please be sure to comment first.