Features: UV steriliser. Sterilise your RapidCool in one minute. Kills 99% of bacteria. Up to 70 uses in one charge. Auto shut off. Safe feeding, anytime, anywhere Preparation and Usage: Automatic shut off after one minute. Instructions enclosed. How it works Step 1 Remove the lids from your RapidSterilise and RapidCool. Step 2 Fit the RapidSterilise in the middle of your RapidCool like shown in the image to the right. Step 3 Press the button, the blue light will flash for 1 minute during sterilisation and automatically shut off once complete. Step 4 Remove the RapidSterilise and follow the instructions of your RapidCool for making a formula feed. New, sealed