This thread converter will enable you to use many wide neck bottles on the market (Lansino Bottles, Mam Bottles) to use with the widemouth flange that come with spectra s1 pump, s2 pumps. Also, suitable for Maymom widemouth and Avent Flange.
--4 pc bottle converters. BPA free
--Enable you to use inexpensive bottles with Spectra s1 pump, s3 pump.
--List of compatible bottles: Mam, Lansino, Wide version of parent choices
--Made from PP material that meets FDA's requirements for plastic that contact food.
