Standard NeckSupports Healthy Bottle-Feeding & LatchAvoid Nipple Preference Gulp-Free, Slower Flow RateProflo™ Venting Technology Developed with Pediatric Feeding Specialists Free of BPA, Polycarbonates, PVC and PhthalatesMade of FDA Approved Food Grade Material Contents: 3 Bottles3 Standard Neck Slow Flow Nipples3 Cap Rings and Leak Preventing Hoods Silicone Proflo™ venting technology rapidly releases air bubbles into the bottle, not baby's tummy. Simple 1-piece integrated nipple and vent means no extra parts to clean or lose.  FloRight™ - Slower flow rate for a gulp-free feeding experience.  Unique Nipple Shape - Gentle slope provides an area for baby's lips to flange and maintain a proper latch. Key for breastfed babies. Patented Proflo™ Venting Technology - Designed to reduce gas and fussiness. A good latch can be hard to achieve. The Balance+ Bottle is designed to support healthy bottle feeding without interfering with mom's personal breastfeeding journey. The unique and intentional nipple shape allows for proper latch and adjusted flow rate that promotes a comfortable drinking pace for baby. Our patented Proflo™ venting technology reduces the potential for colic, reflux, gas, and fussiness. Rest assured, our bottles are 100% BPA free.