Milk storage

I had 51 oz of milk stored before I went to work. After 2 weeks, I have 68. I don't like the idea that he is only taling 3 3oz bottles a day. Colby was taking 3 4oz at this time. I pump more than that in a day. But, not enough for if he took 4 oz. But, I have recently learned that you can get more milk out by hand expressing after the pump stops getting milk out. Here is a picture of the milk I had stored before going to work.