The NUK Orthodontic bottle offers a special nipple that is designed to match the shape of baby's mouth, claiming to "stimulate a natural sucking pattern and aid in healthy teeth formation." This nipple definitely has a "top" and "bottom" but once in place, baby seemed to keep it there comfortably. Overall we like the design of this bottle with clearly marked measures that go up to 5 oz., which we like for when baby needs just a little more per feeding.
We felt the NUK nipple offered a good latch and can believe their claim that it would promote better teeth formation. It did cause this bottle to score a little lower in our "Ease of Use" test because you have to make sure the nipple is positioned properly in baby's mouth.
Cute designs with clear markings that go up to 5 oz.
Easy to clean with no extra parts/valves.
The nipple did collapse at times, but in our case, we didn't notice it effecting baby. Also, using this bottle in the dark might prove tricky as you must have the nipple "up" for milk to flow.
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