Set off 2. Never opened or used. Will come in original boxes. Quickly converts Thinkbaby Sippy Cup into our award-winning Thinkster! Designed to fit all Thinkbaby 9oz bottles. No spill spout - features our cross cut design. Extra soft, medical grade silicone, straw provides an easier transition from baby bottle feeding to Sippy Cups to our straw bottle - The Thinkster. We have won multiple awards based on the ease of transition of our line. It's the only line that goes from newborn to 48+ months, all with the same bottle!