We've been working on mastering the sippy cup, and for the most part, I think he has it down. Sometimes that means literally pointed down, as he really likes chewing on the bottom of the cup for some reason. I think he uses it more as a teething toy than a hydration tool. He always refused to drink from a bottle, so this is all new to him. I don't think he cares for the water much, but I'm not introducing juice quite yet. I think he'll get plenty of sugary goodness eventually, so there's no need to rush into it!