How do I get my 12 mo old to take a sippy cup or bottle?

My son is fed and is completely uninterested in using a sippy cup, he's never taken a bottle. He will drink out of an adult cup if its held for him. But he just plays with a sippy cup, chews on it and spits out the drink. I've tried the straw kind, and the soft spout kind, just purchased a hard spout cup and will give that a try. Should I put water or milk in the cup? Should I not bother with the cup and try to get him to take a bottle first?