I just wanted to share that you can use all ameda parts with a medela! I delivered at stonybrook and managed to get four kits of ameda parts to take home. I read somewhere that you can use them with the pis. I finally got and tried the pis from my insurance and the ameda parts worked perfectly! I had been using a hospital rental but I'm ready to return that. I know extra parts are expensive so if you deliver at a hospital that uses amedas see if you can snag a set as a spare. An added bonus is the ameda actually makes the PIS a closed system and there are no stupid membranes to worry about hand washing and wearing down. I've been using the same ameda parts for 7 weeks now and they still work perfectly.