Have you transitioned off the bottle yet?

I wanted to wean Jaxson off bottles starting around 9 months but it's been harder than I thought. He becomes a monster if he doesn't get his bottle. He's very much a routine baby and likes his routine. If I try putting his formula in a sippy he gets mad and throws it and screams until I give him a bottle. I'm thinking I may just need to wait until he's closer to one. Just wondering who else is still giving their kids bottles?

He drinks water from sippys like a champ and has been since 6 months. He also loves food but is still crazy about his formula.