Maymom Conversion Kit for Medela Pumps to Lansinoh, MAM, Pigeon Bottles is a set of two bottle converted that allows you to pump directly from your Medela Pumps (please find below for compatible pumps) into Lasinoh, MAM and Pigeon Bottles. Content: 2x Bottle converter to allow Medela pumps to be able to use other bottles Compatible pumps: Medela Sonata, Medela Freestyle Flex, Medela Pump in Style MaxFlow BPA, DEHP Free