x4 2nd Generation bottle size changer; designed to avoid interfering with the duckbill, and easier screw on to both the widemouth flanges and the standard-sized bottles
Allow Avent and Spectra S1 and spectra S2 flanges to use with standard sized bottles like medela bottles, Ameda bottles and original Dr. Brown Bottles (note will not fit wide mouth Dr. brown bottle) to replace the wide mouth spectra bottles.
We recommend that you use a bottle-stand as well to reduce the tipping-over of the bottle.
BPA free, dishwasher safe; FDA compliant for food contacts. Every batch is tested for safety. Test reports are online on Maymom's website for your reference.
From a brand you can trust - Maymom and USA based customer service.