Designed for the switch from bottle to sippy, the flexible spout helps stay in baby's mouth. Transitioning from a bottle to a cup is one of baby's first feeding milestones, and while exciting, it can definitely be difficult on your little one too. Munchkin's Flexi-Transition cups are designed to help. With 4 ounce capacity and flexible soft spout, this spill-proof cup is the perfect in-between to practice with until real cups enter the scene. Help make change a little easier to swallow with this starter sippy cup.