This product is super easy to use and easy to clean when needed.The, top section fits nipples, pacifiers, small pump parts, the bottom section fits bottles and large pump parts. You put 100ml of water In the metal part and push the button. Then, just transfer everything to a drying rack. It is designed to take 6 Avent bottles of all sizes, but I can fit 7 in there. I feel much better about using this method for sterilizing than using a microwave, after reading how even microwave safe plastic can leak chemicals. Besides, I loved how compact it is, good enough to store on the kitchen counter without it taking up too much space.