The decorated Nuby Non-Drip feeding bottles come with the patented variable flow Non-Drip Nipple that have non-colic valves to reduce the risk of colic. It also has teething nubs to massage the baby's gums. The teat is conveniently easy to use and prevents any spills and leaks. These feeding bottles come in a variety of colorful designs that are bright and modern, making bottle feeding even more fun!