I have had enough of the drippy sippy. These are 3 we have tried in the 3 weeks since weaning. We don’t use the nuby anymore at all since he leaned how to poke the entire top in. The Avent is the best shape for him but it goes from a little drip to a total mess depending on its mood. The other one is a MLB version of a Playtex, it’s okay but not leak free either. I don’t want anymore milk in my carpet. Help! Does a leak free cup exist?