Kills 99.9% of household germs. Uses the properties of steam. Heats up fast. Compatible with all Chicco feeding bottles, breast pumps and Chicco accessories. Can sterilize up to 6 bottles at once. 24 hour protection from germs if cap remains closed. Practical and effective sterilization. Switches off automatically at end of cycle with Safe Stop. Clinically designed and tested in the Chicco Observatory by pediatricians and doctors.