ugh the people who make the bite proof sippy cups and the click lock straw sippy cups really need to double check their design seriously. my daughter has managed to make the holes in the bite proof sippy bigger don't ask me how I have no idea but it so annoying she's figured out her juice will come out of the holes she's made and she stains everything and plays in it ugh! and the click lock is suppose to be guarantee no leak that's the whole point of click lock well her straw one leaks damnit. and I've made sure it locks it clicks when it's locked again failed!