Ultra fast and convenient Sterilizes 6 bottles in 2 minutes Philips AVENT Express II Microwave Steam Sterilizer's lightweight, compact design makes it ideal for use in and out of the home. Contents remain sterile for up to 24 hours if lid is unopened. * Combines the benefits of steam sterilization with the convenience of the microwave * Steam sterilize six bottles, nipples, and caps in as little as two minutes * Fits most microwaves * Lightweight and compact * Keeps contents sterile for up to 24 hours