hi my name is mary caite i am 14 yrs old and i had the same problem when i was little. my mom did everything. but she found a solution. i had mine through a straw. right after i got old enough to change my formula, i had no problem drinking it through a straw…i think that certain formulas taste different the way you drink them, i loved my formula in a bottle but when my mom changed it for me, then i had no problem drinking it out of a cup.