The manufacturers of baby feeding bottles and nipples make various claims about their products, most of which are unproven. In some cases these claims relate to tests that are over 10 years old.
Since the inception of vented bottles, there has been much more focus on the harmful effects of vacuum (negative pressure) inside feeding bottles. |
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In all bottles without a vent, as your baby feeds, a vacuum is created. This negative pressure makes it much harder for your baby to feed comfortably. He/she has to overcome the strong vacuum by sucking unnaturally hard in order to create a flow of liquid.
This is one of the main reasons why babies develop colic symptoms, particularly if they are smaller infants or have an immature sucking reflex. It makes them tired and irritable and thus they often cry. It is also linked to the incidence of middle ear infection such as glue ear. |
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