NUBY's bottles make feeding simple and easy for you and your baby. Nuby bottles are designed to be safe, comfortable and fun to use so we’ve built in many unique and useful features. Most bottles come with the patented variable flow Nuby Non-Drip™ Nipple that features anti-colic valves to reduce the risk of colic and teething nubs to massage baby’s gums. The nipple is easy to use and prevents spills and leaks.