From the seller

Sterilizing protects your baby from particularly harmful bacteria until his immune system is strong enough. Philips AVENT Sterilizers use the hospital method of steam sterilization, which is quick, easy, and effective, with no chemicals involved. The new Philips Avent electric steam sterilizer has been designed to make sterilizing as simple as possible. With adjustable size, it takes up less kitchen space and the baskets fit both wide and narrow neck bottles. Due to its adjustable size, this 3-in-1 Philips Avent sterilizer perfectly fits the items you would like to sterilize and always takes up the least amount of kitchen space. The sterilizer has been designed to fit both wide neck and narrow neck bottles as well as different breast pumps and accessories. This gives you the freedom to choose the bottles and accessories that best suit you and your baby.