Sterilizing bags are an accessory for quick steam sterilization of baby essentials such as bottles, teats, pacifiers, or breast pump parts. They are typically used in a microwave oven, where they are placed along with the items to be cleaned and a small amount of water. During heating, the water turns into hot steam, which effectively destroys bacteria and microorganisms thanks to the high temperature. This sterilization method is suitable for travel, for example. The bags are often designed for repeated use and may be included in the packaging of some bottle warmers.