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Title: Only good if you use Medela Pump
Review: Initially I was renting a Medela pump from the hospital and I was attaching the bags to the pupm. (Although it was confusing at first to figure out HOW to attach the bags w/o the milk spilling after the pumping session.) But when I purchased another pump (Evenflo Comfort Select Dual- Awesome pump for a 1/4 of the price of the medela) closing the bags was a PAIN! I now use the Lansihoh bags with the double zipper seal.
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