The WOW CUP® for Baby is sure to become your child’s primary everyday drinking cup providing your family with the highest quality cup and best overall 360° drinking experience available today. • 100% Interchangeable Parts: The baby and kids cups are 100% interchangeable • No gaskets and hidden areas to get all grimy - dishwasher safe • Tritan™, Polypropylene and Silicone/BPA and Phthalate Free Product Dimensions: 4.2 W x 3.2 D x 4.5 H inches