I would either reduce the amount of bottles each day til completely gone.
or
Just stop it cold.
Both are hard do but if you don't do it at one years old it's much much harder they start to really get attached. After a day or two they usually forget about the bottle and stop throwing a fit for it or freaking out. It's really hard on mom the first few days because you just want to give in but don't.It's similar to someone stopping smoking in my opinion.
I'm saying this because I was weak and gave in, my daughter had a nighttime bottle with water only til two and half. She didn't sleep through the night either, Mommy refilled her water in the middle of the night as the spoiled two year old moaned and asked for more. I So regret doing that. She's was also on the sippy cup til age 5 and has 3 cavaties. If I have more children were going to a regular cup early on. Her bottle was her security item. I so wish it had been a blankie instead.
They have these awesome sippy cups at Walmart where the part that goes in the mouth is the same material as a nipple and that could work as a transition. There the cheap sippy cups in multiple colors for like a dollar each.