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Vented bottles - Baby Feeding Bottles, Nipples,Baby Teethers,Baby Training Cups, Baby Bottle - LIANGCAI SILICONE

Vented bottles2013-5-10 9:58:43



Vented bottles


"Vented" bottles allow air to enter the bottle while the baby is drinking without the need to break the baby's suction during feeding. Alternatively a bottle liner can be used to enclose the formula instead of directly in the bottle. The liner collapses as the formula is drained.

Vented bottles work by allowing air to enter while preventing the liquid inside from escaping. Avent is a popular brand in this category in the United States.It works by an "anti-vacuum skirt" in the base of the teat, where it forms a seal with the bottle. The skirt acts as a one way valve, allowing air to enter the bottle but not liquids to leave. If the sealing ring is tightened too much, the skirt is compressed too tightly to allow it to open and the bottle will not vent. If the sealing ring is too loose, liquid leaks from the bottle.

There are multiple patents for technologies in this area. Initial designs called for a complex spring and valve system that was impossible to clean and sterilize. Current research is in specialized materials with microscopic pores that allow the entry of air without the escape of liquids.[This avoids the caregiver having to get the sealing ring tension just right. It remains to be seen whether these materials can withstand the rigours of daily cleaning and sterilization. Another competitor, Dr. Brown's, offers a system whereby the vented air is conducted through a tube to the bottom of the bottle where the airspace is when the bottle is in use.[This avoids the vented air from bubbling through the liquid and unnecessarily aerating the liquid. The aeration may cause nutrients in "human milk and infant formula (to) decrease in concentration . . . to a level that may be clinically significant".

 



 

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