I used my new bottles today and I was able to pump 12 ounces total. One side was an ounce behind but I still think that is not too bad. I am not going to push myself but we will see how much I can work up to. I am still only pumping about 6 to 8 ounces at my 2pm and 8pm sessions. I have been able to keep up with Ben and still have some left over to freeze for the future.