Medela Quick Clean Micro-Steam Bags are a convenient and easy way to sterilize baby bottles, breast pump parts, and other small items. Simply place the items in the Medela Quick Clean Micro-Steam Bags, add water, and microwave for a few minutes. The high-temperature steam generated by the Medela Quick Clean Micro-Steam Bags kill 99.9% of germs and bacteria, ensuring that your baby's items are safe and clean.