3-Way Baby Bottle Sterilizer Case Thank you for viewing! I used this for about 2 years with my eldest and second sons. It functions as a chemical sterilizer, microwave sterilizer, and storage case. I washed and stored it after use. There are no noticeable scratches or stains. There is no instruction manual. Please refer to the official website for instructions: https://www.lec-online.com/c/03babykids/4903320047921 Thank you.