This is a set including a Pigeon manual breast pump, an adapter for freezer packs, and breast milk freezer packs. A breast pump is a convenient item for breastfeeding. I bought this one after considering an electric pump, and it allowed me to express milk easily without using much force. I haven't used it very many times. I have washed and sterilized it with the items for baby bottles, but please wash it before use. This is ideal for those who want to try a breast pump or don't mind a used item. There are 23 breast milk freezer packs.