My son will be a year old on Friday. We have tried 3 different sippy cups since he was 8 months old. It’s not that he doesn’t know how to use them, he doesn’t want to use them. We give it to him or try to help him with one and he screams. He loves his bottles though and will hold them and drink out of them all by himself. What do I do?? Is it wrong to keep letting him use a bottle after he turns one? What do I do to encourage the sippy?

Sippy cups I’ve tried: Nuk Trainer, Munchkin 360, and a basic parent’s choice straw cup.