A manual breast pump offering total control of the suction level and pumping rhythm. Enhanced efficiency, clinically proven to express more milk than a hospital electric pump. Fits all Philips AVENT breast pumps and teats. Soft massage cushions trigger natural let-down, like baby. Gentle vacuum mimics baby's suckling for steady milk flow. Includes: Leakproof, twist on lid. 180/6oz milk containers. 2 slow flow teats.