UV light is a safe and dry method of sterilizing. With 4 different functions It can dry, sterilize, or dry sterilize in one, and store your baby bottles in a hygienic way Kills viruses 99.9% of bacteria: viruses bacteria don't stand a chance against the UV sterilizer. Uv light kills viruses 99.9% of harmful bacteria without heat, steam or harsh chemicals Safe and energy-efficient: the Auto shut-off mode automatically switches off the UV lamp when the door is opened during use. The long-lasting, energy-efficient Philips UV bulb lasts up to 6000 hours Time-saving: use this baby bottle sterilizer to sterilize your bottles and other feeding accessories in advance as contents are kept sterile for up to 24 hours with the door closed. Filters dust, pollen and airborne pollutants: includes two replaceable, washable filters which help to keep dust and particles out of the air used to dry your bottles and feeding accessories