These microwave sterilizing bags are convenient for trips home, overnight stays, and more. Each bag can be used 20 times. Features: 1. You can sterilize anything that can be put in a microwave, such as baby bottles, breast pumps, and pacifiers. 2. As long as it fits in the bag, you can use the sterilization bag to generate steam and achieve sterilization. 3. Sterilization takes only 1.5 to 5 minutes, it's fast, convenient, and easy to use. 4. The bag can be used repeatedly 20 times, and you can mark the bag after each use.