This yellow case featuring Disney characters allows you to easily sterilize baby bottles in the microwave. Nishimatsuya Microwave Baby Bottle Sterilizer (with instructions) Sterilization time: 3 minutes. Compact size that doesn't take up much space. Sterilizes one baby bottle at a time. Its compact size makes it easy to carry when traveling. Recommended for those who only use it occasionally. Can be used for baby bottles, breast pumps, and sippy cups! Used a few times and stored away.