Podywody, I had the same problem. I had been battling with ds after he stopped taking the bottle gaed 2 weeks!!! I tried everything you can imagine - every bottle on the market, breast milk, formula, different people, in between feeds, when starving hungry - but nothing worked. He knew how to take the bottle, but just refused. At 4 months I also started to introduce beaker with water - still didn't get anywhere. I stepped up trying the bottle again at about 18 weeks - this time with the help of a different HV - still didn't get anywhere. I finally gave up about 6 weeks later. He had settled into a routine (at last!!) and the feeds ahdd really reduced. He still wouldn't drink from the beaker, but was eating 3 meals a day.
Then about 3 weeks later, in my desperation to get him to drink water I put some in his MAM bottle - you won't believe it, but he pounced on it!! I then introduced milk and kept on giving him one bottle a day and slowly increased it over the next few days. I was still giving him one breast feed in the morning, when last weeks he decide he didn't wnat it any more. He'll be 8 months tommorrow and I no longer breast feed him.
I'm sorry the message is so long, bu I guess what I'm trying to tell you is that it will happen when you least expect it and when you aren't stressing bout it. Everyone gave me this advice and as hard as I tried, I just couldn't relax about it. When I truly didn't care anymore ds decided he wanted to drink from the bottle.
I'm sure everything will work out just fine in the end. You could try the MAM bottle, but you may well find that if your ds is anything like mine then it's not the type of bottle that he doesn't like, but just the bottle itself.
Good luck. I really do understand where you're coming from xx