Nuby No-Spill Easy Grip Cup, 10 Ounce

No-Spill Soft Flex Spout The soft silicone spout is gentle on tender gums and emerging teeth. As a child puts lip pressure on the straw, the Touch Flo value opens and water flows. When the child stops sipping, the valve closes. The soft silicone spout also promotes natural drinking action and healthy oral development.