DESC: Our starter set makes a terrific gift...and you simply can't find a better bottle than award-winning Avent! The patented nipple is scientifically designed to promote a natural sucking action that closely simulates breastfeeding. A special anti-vacuum skirt ensures an unrestricted flow of formula, so infants swallow less air and experience less colic. Featuring wide neck, easy-to-clean bottles that may be boiled, frozen, and microwaved. Dishwasher safe, too. And all components are compatible with other Avent products, so this makes a great set to build on.