Since my son was born with severe birth trauma and spent two weeks in the neonatal intensive care unit, then I had to express breast milk. First I had to express breast milk with hands, and then I bought a breast pump. I can confidently recommend the breast pump by British company named Avent. I used a manual breast pump. Very easy to use, easy to clean, can be used in the sterilizer. This is not advertising, this is my personal experience.