Munchkin Mighty Grip Spill-Proof Cup, 10 Ounce, Colors May Vary (Discontinued by Manufacturer)

From the Manufacturer

Tell your kids to get a grip when they sip. This fun-to-grip contoured cup makes it easy for little hands to hold and to sip a favorite drink. Tipping won't spill this leak-proof cup with It is built-in valve. The valve is made of soft silicone so it's very comfortable for your growing child. This is one unique cup with a mighty big advantage.