Collect breast milk at work or during other absences from baby with the Medela Pump In Style Advanced. Designed for moms who pump several times a day, this daily-use breast pump features 2-Phase Expression technology that mimics the two distinct phases of how babies breast-feed and offers portable convenience for pumping anywhere. Medela Pump in Style Advanced features patented 2-Phase Expression technology, which mimics the two distinct phases of how babies breast-feed. This is proven to get 18% more milk when double pumping vs. single pumping with 2-Phase Expression technology at Maximum Comfort Vacuum. All pumping accessories (breastshields, valves, bottles, etc.) are made from BPA-free plastic.