Sileu Clean Plus USB Rechargeable Electric Sterilizer Dual Action Sterilizer: Using UV rays and ozone. It completely sterilizes the menstrual cup and other small objects in 5 minutes, effectively destroying more than 99% of the microorganisms present. Can be used on any small silicone, plastic and/or metal object you want to sterilize (ozone can oxidize materials such as silver). Ideal for sterilizing menstrual cups, teethers and baby toys, nipples, pacifiers, earphones, toothbrush heads, makeup accessories, manicure and pedicure material, nail clippers, razors, etc. Please note that due to the action of ozone, sterilized products may lose color gradually.