Dr. Brown's Options Narrow Bottle, 4 Ounce by Dr. Brown's

Anti-colic vent system is clinically proven to reduce colic; Decreases spit-up, burping, and gas Shown to better preserve nutrients in breast milk and formula; Aids in digestion for good night’s sleep Offers flow rate that supports breastfeeding; Soft silicone nipple helps breastfeeding baby naturally latch. Material: Plastic Each nipple is engineered for consistent flow, so you and baby know what to expect International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.