I'm trying to choose the best breast pump and milk storage system I can find. I travel extensively for work and I'll even be pumping in the car. I found the Kiinde system; which looks awesome. But, I'm not sure what I will be able to express from each breast at each pumping session. Ideally, I would like to pump directly into the storage bag, freeze it, thaw it, and feed directly from the bag. That is how the Kiinde system is intended to be used. But, will I get 4oz of milk from each breast at each pumping session? If not, then I'll have to consolidate my milk from 2 collection bags to one storage bag; which defeats the purpose of the Kiinde system. What worked best for you? I'm not worried about cost, convenience is most important to me.