Eliminates up to 99.9 percent of harmful household germs with the power of steam. Sanitizes quickly and naturally. Modular system: Full size, Compact and Microwave modes. Full size sanitizes up to 6 bottles including nipples, cap rings and lids. Compact Mode is to be used for sterilizing smaller items, feeding accessories and more, and the Microwave mode is the quickest sanitizing cycle fitting most standard microwaves. 24-hour protection from germs if the cover remains unopened Uses tap water No chemicals Coated heating plate prevents burned-on water mineral residue Quiet operation and Automatic shut-off Holds up to 6 bottles including nipples, cap rings and lids