To drop the AM bottle, I would prepare DS's breakfast before I brought him downstairs for the day. That way, when he woke, I would change his diaper and bring him right down to eat his breakfast. I would offer his sippy cup with milk at this time. It took quite a while, probably a good month or so before he drank a good amount of milk from his sippy. In the meantime, I just made sure he ate lots of cheese, yogurt, cottage cheese etc, to make up for the drop in calcium.
All right...I lied...it probably took a good 2-3 months before he took enough milk from his sippy cup.
To drop an afternoon bottle, I would just offer a snack at the normal bottle time. I found the mid day bottles, the easiest to drop.
Hope that helps.
Good Luck!