Help your little one comfortably transition from bottle to cup with Dr. Brown's Wide-Neck 2-in-1 Transition Bottle Kit. The Dr. Brown's 2-in-1 Transition Bottle Kit is designed to grow with baby and easily converts from Options bottle to sippy spout bottle. Includes a Wide-Neck 9 oz/270 ml Options bottle, level 3 nipple and a sippy spout. When baby's ready, simply replace the vent and bottle nipple with the super soft sippy spout. The 100% silicone spout is gentle on little mouths. The 2-in-1 Transition Bottle Kit is easy to clean and is dishwasher safe (top rack only). Spout fits Wide-Neck 5 oz/150 ml and 9 oz/270 ml Dr. Brown's Options bottles. BPA free.