R.H.
My suggestion is to decide what you want and do it. Take the bottle away and just let him deal with it. My sister had to do that with her son, she just set out side his room when he cried so she knew he was ok. OR if you want to try filling it with water. Some kids will give it up if it has water in it not milk or what not. But my biggest suggestion is to just take it away and let him cry it's easier and fast that way. you can do it all at one time and be done. The other ways might work but they take longer and you go through hell while doing it either way.
I'll have to say i've been reading the other posts and i totally agree.. I'm amazed that these parents on here aren't wimps. Most parents think they should just bend over for there child and NEVER let them cry. Children have to learn to put themselves to sleep. Weather you want to do it now or later is up to you BUT the sooner you take that bottle out of the bed the better for his teeth. My daughter used to always sleep with a blanket on her head. It doesn't hurt them at this age. If they can't breath they will turn there head. Much younger children can't move as easily so you don't want blankets in there but by 6mo. they can and will turn their head.
The easiest way to get rid of the bottle is to go cold turkey. JUST take it away and let them go. Check on them every 5min. BUT NEVER PICK THEM UP and after you put them to bed. rub their backs, lay them down, wisper or sing to them but when you pick them up you are telling them they are right there is something to be upset about. Becuase if there wasn't anything wrong you wouldn't be picking them up. Right ok well good luck