Nuby No-Spill Soft Sipper Cup The Leak Resistant Soft Sipper� is uniquely engineered with contour finger grip that are sized to fit your child''s grasp. This cup features with soft sipper spout gentle to baby''s tender gums. The soft spout is covered by an easy-to-use flip top cap. This uniquely designed feature protects the sipper spout from residue when not in use. When child is ready to use the cup the top cap simply "flips" back and rests in the lid of the cup. The soft sipper contour fingers grips are designed not only to be soft on baby''s delicate skin but also provides good grip to mom''s fingers. The No-Spill� cap features a dual-flow� valve system engineered to help protect against spills or leaks. Liquid pass through spout only when your child sips. The Leak Resistant Soft Sipper� is microwave safe; however microwaving should be done without lid to avoid pressure build up. The Soft Sipper� dispenses a variety of liquids ranging in consistency from fruit juice to milk and water. Look for extra replacement valves sold separately. All Nuby products are made of safe durable non-toxic materials and exceed all government safety regulations and standards.