Philips Avent Microwave Steam Sterilizer Bags provides a quick, easy and effective way to ensure you always have sterile baby bottles and products wherever you are.100 sterilisation cycles within one retail pack 5 microwave bags per retail pack Clever product features for more convenience:Easy to use (Already in 90 seconds, bottles and breast pumps can be sterilised)Sneak-peek window (A window is included in the bag, to check whether the disassembled parts are positioned properly in the bag for optimal sterilising)Tick boxes (You can keep track of the times you used the product)Safe zone (include a Safe Zone area where the bag can be safely grabbed when taking the product out of the microwave after the sterilisng cycle)Quick and effective sterilisingKills 99.9% of bacteria/germs