The Nuby RapidSterilise kills 99.9% of bacteria in 1 minute, sterilising your RapidCool with the press of a button, at home or on-the-go.With up to 70 uses per charge, this portable UV steriliser offers rapid sterilisation and a sleek travel-friendly design, featuring a long-lasting rechargeable battery, a simple wipe-clean finish and an auto shut-off function to make every stage of feeding simple and stress-free.To sterilise your RapidCool, remove the lids from your RapidSterilise and RapidCool. Fit the RapidSterilise onto the RapidCool, then fit the RapidCools digital lid onto the RapidSterilise.Press the RapidSterilise button: the blue light will flash for 1 minute as it sterilises the RapidCool and lid, then shut off automatically.Remove the RapidSterilise from your RapidCool. Your RapidCool will be perfectly sterilised, ready to prepare your next feed.