my two were never keen formula lovers. DS is terrible at drinking his formula since i weaned him onto it at 6mths old! we have tried everything and have just given up! (he is on a multi vitamin and has about 100mls formula in his porridge) we will be introducing cows milk very soon, he's 10mths.
DD never held a bottle in her life. As soon as on cows milk dd scoffed upto 3 200ml sippy cups of milk in a day! id just give her the sippy cup on her little sofa couch and let her go. she loved her milk once on cows. We introduced siluted cow's milk with her at 10mths.
sometimes its not what you give them the milk in, sometimes its the actual flavour of the milk its self. My babies are reall fuss pots.