Do All Nuby Silicone Top Sippy Cups Leak?
I am now on my 2nd Nuby cup, hoping the first one was just defective, but this one leaks too! When I put the lid on and tighten it, the silicone top moves just enough that the little notches don't line up and then it leaks all over the place. I have a Munchkin cup that is very similar, and it does do the same thing IF I tighten it too much, but the Nuby does it even before the lid is all the way on. Am I doing something wrong?