Take Baby Steps To Sippy Cups With Dr. Brown’S Options+ Wide-Neck Sippy Bottle Starter Kit. Transition From Bottle To Cup One Step At A Time With This Nipple-To-Sippy Conversion Kit. Using The Dr. Brown’S Option’S+™ Wide-Neck Bottle That Baby Is Familiar With, Just Remove The Vent And Replace The Bottle Nipple With The Super Soft, 100% Silicone Sippy Spout. Plus, It Comes In A Variety Of Cute Colors And Prints! The Sippy Spout Fits Both 5 Oz/150 Ml And 9 Oz/270 Ml Dr. Brown’S Wide-Neck Options+ Bottles. The Sippy Bottle Starter Kit Is Dishwasher (Top Rack) And Sterilizer Safe. Kit Includes A 9 Oz/270 Ml Options+Wide-Neck Bottle, Level 3 Nipple And A Sippy Spout. Bpa Free. 6M+.