Nuby Thirsty Kids Stainless Steel Flip It Reflex Mug has all the features you need for kids on the go. The soft silicone mouthpiece is uniquely designed to be delicate and gentle on your gums and teeth. The lid is specially designed to prevent drips and spills when the hygienic cover is closed. This colorful mug design not only keeps liquid cool, but also helps protect a mug's furnishings from "sweating." Ideal for trips and short trips. The leak-resistant cup dispenses a variety of liquids, ranging in consistency from fruit juices to milk and water.