AVENT STERILISER - The steriliser uses steam to safely kill any bacteria, recommended by midwives. Takes approximately 8 mins. Just tip 90ml of cold water into the base(use a baby bottle to measure the amount) and switch on. Automatically switches off. Holds 6 Avent bottles in the bottom, lids and teats go in the top. The 2 top cages clip together and can go on the top shelf of the dish washer to wash them if you want to. ;