EBF To Bottle Feed

Hi mommies, how to train LO to bottle feed? She's already 5 months old. Im currently working and naiiwan sya sa mom ko, nagagalit sya pag tinatry nya ibottle feed. We tried cup feeding and different teats including expensive ones but it didnt work. Dinadropper nlang milk nya, nkakaawa na kasi di sya nabubusog ?