Papablic breast adapters for Spectra S1 S2 Avent for direct into Medela Dr Brown or other similar standard bottles compatible - Leak-Proof Bottle Adapter, for Spectra S1 S2 Pump Flanges to Use with Medela Dr Brown standard Baby Bottles - allows wide mouth flange to direct to standard neck bottle - 4 Pack never used - in box - I just bought one too many boxes - bundle to save more ❤️