How to use a breast pump. Look at this great video on how to use a breast pump. Ameda is one of the best pumps because of its proven airlock protection. This protection protects the milk from viruses, bacteria, and mold growth. This pump has not been recalled or has not had any problems with the milk backing up into the tubes, which can cause mold in the tubing. We sell this pump in the Shop at Full Circle and now through August there is a $50.00 rebate. What features do you look for in a breast pump?