The Medela Calma bottle works through a series of valves. The top is composed of three different pieces. The nipple itself is soft, round and completely open in the top.
Calma by Medela has a patented air-vent system that allows milk to flow only when baby creates suction. It is suitable for all ages, eliminates the
Medela Calma Bottle Nipple and Collection Bottles, Made without BPA, Air-Vent System, 8oz / 250mL
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