Philips AVENT Soft Spout Magic Cup, 9 Ounce, Twin, Color May Vary
Where's the magic? The trick is the patented nonspill, easy-sip, Magic Valve found  only in the Avent Magic Cup. While your child drinks, the valve flexes open to allow air in. That  means less suction is required, making it easier for your little one to drink. When not in use, the  Magic Valve closes, so no messy spills appear. The Magic Cup is designed to work with other  Avent products, and it fits most car and stroller cup holders, making it ideal for travel. The Magic  Cup is made of durable, translucent polypropylene plastic (in an assortment of fun colors) so you  can see when it is empty. Because of the firm spout, the 9-ounce size is recommended for  children 6 months and older.--Kate Woodbury