Q&A: Do I Need To Sterilize?
Do I have to sterilize my bottles and/or nipples?
If baby is healthy and at home (not sick or in the hospital), there's no need to sterilize her bottles or nipples. Washing them in hot, soapy water or a dishwasher before each use will do just fine.
However, if you're pumping for a baby that is in the hospital, most doctors will recommend sterilizing her feeding equipment. Ask your hospital for their specific milk storage guidelines for your baby's special needs.