I have used these cups since my daughter was two. Now my 1 1/2 old son loves them also. I never had a problem with them before, but this time one of the cups leaked the other didn't. Just make sure that they are not put down on their sides. I think using Sponge Bob is great, much better then Dora or Diego. My son loves them and he hates change so we are going to use them either way. I still think it is a wonderful fun cup to use.Get more detail about SpongeBob SquarePants 10 oz. Big Kid Insulated Straw Cup.
