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Title: Parts must be dry to work
Review: We have been using these bottles along with the Dr. Brown's bottles with our 3-week-old. Several nights ago she started spitting up a lot and getting fussy while feeding with the Playtex Ventaire. The problem? The bottles weren't venting properly. Because the vent is at the bottom, it needs to be completely dry in order to work, otherwise it will stick and not vent. Our bad for not drying them well enough after washing and before before assembling them, but we decided to switch exclusuvely to the Dr. Brown's because they are also made to vent, but via the tube in the middle. No spit-up or fussiness since we stopped using the Ventaire. Good concept, but requires extra effort on your part.
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