Our Nuby 360 Degree Wonder Cup is the next step in the transition from bottle to open cup drinking. Specially designed with your little one in mind, the No-Spill valve opens with lip pressure allowing your child to control the liquid flow rate then automatically seals as soon as your child is done sipping. Features colorful printed design and a 360 Degree edge that can be sipped from any side for big kid drinking. No Spill 360 Degree rim lets your child sip from any side of the rim, easing the transition to open cup drinking. The pressure sensitive silicone rim TOUCH-FLO feature only allows liquid to pass through when your child is drinking. The silicone rim is easy to clean and check that it is clean and clear. The cup is suitable for the top rack of the dishwasher. Made of durable and lighweight Tritan from Eastman transparent base allows parents to see how much liquid has been consumed.