My baby is now 4 months old. He used to drink 1 bottle of formula milk everyday until he was about 2.5 months. Then 1 day he just suddenly stopped. I've tried everything from making him hungry, having different people feed him, etc.. but to no avail. Sometime when he is in a very good mood, he'll drink an ounce but that's it. His nanny tries feeding him everyday but to no avail. I myself have given up. I think he'll just skip the bottle part and just go directly to a sipping cup :(