You can use Medela parts with the Motif Luna, but only with an adaptor. Adaptors for using the Momfit Luna with Medela parts cost about $10 and allow you to pump directly into Medela, Dr. Brown, and Evenflo bottles. However, you can use the Motif Luna with Avent, MAM, and Spectra bottles without the use of an adaptor as they are directly compatible.