• Patented valve and natural flow for an easy transition from the bottle. • The valve design requires a slight suction to open, making it easier for little ones to drink. • The leak-proof valve locks in place, even when the cup is dropped or thrown, and disassembles for easy cleaning. • Soft, comfortable, non-slip, and contoured grip, with adjustable handles that help little ones control their drinking. • The OXO Transitions sippy cup with removable handles features a patented valve. • The spout has a natural flow for an easy transition from bottle feeding. • The cup has convenient measurement markings and soft, non-slip, removable handles. • The OXO Tot Transitions series features interchangeable cups and lids to facilitate the transition from baby to toddler to big kid.