#breastfeeding supplies

Maymom 21mm Flange and Duckbill Valve Review – Spectra S1 S2 Compatible?

After two months of daily use with my Spectra S2, I tested the Maymom 21mm flange and duckbill valve combo to see if third-party parts can truly replace OEM pump accessories. Here's my honest verdict on fit, suction performance and long-term durability.