Nuby 3 Stage Non-Drip Standard Neck Bottle 11oz 320ml. (Aids in transition from bottle to cup) Soft Silicon Spout Included. Graduated in both ounces and ml. ? Anti-Colic Air System (helps prevent ingestion of air by baby) ? Vari-Flo Valve (allows child to control liquid's flow rate) ? Teething Nubs (massage and stimulate gums) ? Easy Grip Design (makes it easier for a child to hold)