The unique, one-piece no-spill soft silicone spout is easy to use and easy to clean. The super spout promotes a natural drinking action and healthy oral development. The soft silicone no-spill spout is uniquely designed to prevent drips and spills while being delicate and gentle to your child's gums and new teeth. Hard Straw Cup Set is featuring pressure-sensitive touch-flo feature regulates fluid intake with the sucking action of the child, when sucking action ceases, the spout closes, ensuring a leak-resistant cup.