When it comes to bottles, a good latch can be hard to achieve. That's why Evenflo created the Balance + Wide Neck Bottle, providing a complete line of feeding solutions for your baby's changing needs. Designed to support healthy bottle-feeding without interfering with mom's personal breast-feeding journey, Evenflo developed a unique and intentional nipple shape to allow for a proper latch along with an adjusted flow rate that promotes a comfortable drinking pace for baby. These are key components for moms that will be breast and bottle-feeding. This gentle feeding system also comes with Evenflo's patented Proflo venting technology that reduces the potential for colic, reflux, gas and fussiness. To help take the guesswork out of feeding your little one the Evenflo Balance + Wide Neck Bottles have molded measurement markers in both ounces and milliliters to provide an easy and accurate way to measure the volume of liquids without the risk of the measurements washing off. An added bonus is that you can pump directly into these wide neck bottles with the use of the Evenflo Balance + Wide Neck Pump Adapter (sold separately) for added convenience. Rest assured that Evenflo bottles are 100% free of BPA, polycarbonates, PVC and phthalates and are made of FDA approved food grade material.