have you tried putting just plain water in it? I don't know what product you are talking about, my youngest is 6, i've never given food in a bottle.
My oldest son had a pacifier much too long and it affected his bite and now we are paying for it in braces now. So it certainly is a good thing that you end it now. Crying it out will get less over the next few days... It's pure agony and i really feel for you!