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Title: Not necessary
Review: Don't bother with these. They are expensive for only 4 bottles and totally unnecessary. It is much easier to buy storage bags. If you are pumping full time, you will be storing alot more than 4 bottles at a time. I also found that I did not like these bottles for feeding because they do nothing to prevent air from entering baby's belly and the result is gas or worse, colic.They also flow too fast for newborns.
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