Well, K., why wouldn't he scream at the top of his lungs? You give him what he wants in 3 minutes flat! Screaming works for him! He'll start using that neat trick to get anything else he wants once he figures it out. (It won't take long, I promise you!! I'm sure he's a smart little cookie!)
No more juice. Only offer water or milk. Tell him that he has to drink his milk first (put only an inch in the cup) before he can have his food. He'll be hungry enough to finish off the milk in order to get the food. If he screams, tell him that when he is ready to come to the table and not scream, then he can come back, and remove him from the table.
This will start holding him accountable for the screaming first, and persuade him to drink a little milk from the cup second. After you have been able to cut out the screaming from the table, throw away ALL of the bottles. If you have NO bottles, you can't give in to him. Tell him that you are very sorry, but the bottles are gone and he'll have to drink from a cup. NO MORE JUICE until he makes a complete switch to the cups for milk, with no more demanding a bottle.
Juice is empty calories. It takes up his mind and stomach and you need to remove it so that he can make the transition to milk.
Just do it. It's hard. It's what happens when they get used to walking around with a bottle. If you have another baby, wean from the bottle at 12 months once you go from breastmilk/formula to regular milk. It's much easier to wean from a bottle before they are walking.
Dawn