<b>Breastmilk Storage Bag Adapters.</b> <br> <p>Fits most wide neck breastshields (Avent, Spectra S1/S2 Widemouth flanges) <p>Compatible with popular bags like Lansinoh, Nuk <p>Pump directly into storage bag <p>No milk loss due to transferring from collection bottles to bags <p> <b>Disclaimer: </b> Maymom is an independent company. All other trademarks (Lansinoh, Nuk, Medela, Avent, Spectra, Ameda) used here belong to their respective companies. Maymom is not affiliated these companies nor is the product endorsed by these companies.