Kills 99.9% of germs with natural steam sterilization, followed by HEPA-filtered drying to prevent mold. 4-in-1 functionality: Sterilize + dry, sterilize only, dry only, and storage. Fast 10-minute sterilization and 40-minute drying. Hygienically stores items for up to 48 hours. Large 2-layer capacity fits 6 bottles and more. .