I used for 1 year and can pump 10-14 ml per times. I am a full pump mom and pump 3 times per day during 3rd - 9th month and 2 times per day during 10th-12th month.
I used milk bottles and Boots milk bags for storage of milk and I have just changed the feeding by fomula milk "Wo Kong Tong" after my bb girl became 1 year old.