You can’t go wrong with any of these suction milk collectors, they will pull your letdown when nursing so you are able to “pump” the other side while baby nurses on the other side. This is great to do for each nursing session if you are wanting to save your milk to start a little freeze stash or make bottles with without having to put a pump machine on. Not the haakkaa shell acts as a milk collector more so much can also suction for me I didn’t feel a very strong suction pull. I also included the manual pump because I used this a lot as well when I was nursing baby on one side and then us manual pump in the other side to get the biggest letdown pull without having to sit on an electric pump! LTKFamily LTKBaby LTKBump