Take baby steps to sippy cups with Dr. Browns Options+ Wide-Neck Sippy Bottle Starter Kit. Transition from bottle to cup one step at a time with this nipple-to-sippy conversion. Using the Dr. Browns Options+ Wide-Neck bottle that baby is familiar with, just remove the vent and replace the bottle nipple with the super soft, 100% silicone sippy spout. You and your baby will love the playful green stars design! The sippy spout fits both 9 oz/270 ml and 5 oz/150 ml Dr. Browns Options+ bottles. Sippy Bottle Starter Kit is dishwasher (top rack) and sterilizer safe. Kit includes an 9 oz/270 ml Options+ Wide-Neck bottle with level 3 nipple and a bottle sippy spout. BPA free. 6m+.