Like the title says, these nipples are a hit or miss. We have gone through multiple nipple flows and some work just fine and some don’t. It really depends on the package… it seems like they have horrible quality control. We have bought two flow 2 packages and one of the packages none of the nipples worked (holes were messed up). Same issue with flow 3. One package would be fine and baby wouldn’t have any issue getting milk, but then another package of the same flow there would be an issue sucking milk out. Their flow sizes make no sense either. The flow from size 3 to 4 is a big jump. Whereas flow 2 to 3 is not much of a difference and requires so much sucking to get milk out. For our two month old, we have found flow 4 works for her right now. For better quality, I would recommend MAM bottles and nipples instead.
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