Suction is Great and so is the quality
3 ounces just from suctioning it to one side while my baby nursed on the other for 20-30 min. I am happy I took the chance at purchasing these. This is a great product at this price. These suction pumps are perfect. They give other leading brands a run for their money.  The suction on them is strong and they stay put if put right. You have to know how to use one of these for them to be put on at full suction without a nursing pumping bra. To make sure no spill errors occur i always wear my pumping bra while suctioning the hakaa. Although its suction is strong i would rather be more secure just incase.. Doesn't matter what brand it is these have to have the top round flap pushed back before squeezing to suction, then release the flap after squeezing for full suction if no breastfeeding bra is being used so it can be at full suction. Like I said the suction is strong but can be adjusted to the suction desired.
Rating: 5 stars