SPOUT NIPPLE: Helps babies practice drinking from a shape other than a nipple.

LEAK-FREE: Patented inhale/exhale valve prevents leaking and ensures that liquid does not flow backwards reducing unwanted colic, spit, and backwash.

EASY TO CLEAN: Pure silicone spout with no rubber packing enables easy cleaning and sanitizing.

COMPATIBILITY: Use only for Putti Atti Silicone Spout & Straw Sippy Cup .