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Title: Beware the Circle!!
Review: I ordered these for my two year old. She still uses a bottle at bed time. I did not realize that I was ordering the Fast Flow... but I noticed quickly after giving the 7 month old the wrong nipple! Milk all over the place! When I saw the nipple up close, I saw that the hole is MUCH bigger than the other ones I got last time. Whoops. Upon further inspection, there is a circle on the under side of the base of the nipple, which seems to be "filled". The other Size 2's are only 50% filled, and the 1's only have it a 1/4th filled in. Makes so much more sense now!!I love these things though. Much better than the brown nipples! Very durable!NUK Silicone nipples were also the ones my daughters both liked most when transitioning from breast feeding.
