Does anyone use the Medela Pump In Style with the Playtex Drop-Ins? Does this work well? We are starting our registry, and want to use the drop-ins because it seems like much less clean-up (we both work rotating shifts, less clean up will be ideal). Does anyone have experience with using these 2 together? I have read that you can use the Playtex Drop-Ins Storeage Set with the Medela pump, do I need a special adapter or anything?