The Dr. Brown's bottle feeding bundle allows you to transition your baby from bottle to sippy cup while reducing colic with innovative nipple and vent technology. The Anti-Colic Options Narrow Sippy Bottle Starter Kit includes a 8oz bottle, Level 3 nipple, and soft silicone sippy spout to convert the familiar bottle to a sippy cup to develop new drinking skills. The snap-on cap keeps the spout clean on-the-go. The bundle also includes a 6-pack of Dr. Brown's Y-Cut Nipples that are ideal for thicker liquids with the signature internal vent system to reduce negative feeding side effects. Both BPA-free components use soft, 100% silicone for comfort and consistency. The breast-like nipple shape provides a natural feel while the Anti-Colic vent mimics nursing by allowing vacuum-free feeding at your baby's pace with less spit-up, gas and burping. The vent system also preserves nutrients for better digestion. With this bundle, you can transition your baby to thicker liquids and then from bottle to sippy while reducing colic and discomfort for happy, healthy feeding.