Let your little one sip without the spills with the Munchkin SpongeBob SquarePants Click Lock 9 Oz Insulated Straw Cup. It features leak-proof protection you can see, feel and hear--just turn the lid until you hear the click and you are all locked and set--guaranteed. It is insulated for cooler, fresher drinks with a clear outer and a color-tinted inner cup so Mom can see fill level. The soft, flexible silicone straw is leak proof in the open and closed position. Cleanup is a snap--top rack dishwasher safe