No matter your child's stage or preference we have the perfect Cup to make you and your little one happy. OXO's Transitions Sippy Cup with Removable Handles features a patented valve which requires light suction to open for easy sipping. This leak-proof valve stays in place even when Cup is dropped (or thrown.) and comes apart for thorough cleaning. The spout has a natural flow rate 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 for easy transitions from infant to toddler to big kid.