My son is 17 months and he refuses to drink from anything besides a MAM bottle! I feel guilty because I don't want him to have bad teeth because of me but I just don't know what to do anymore! I've tried every single one of these cups below and he starts crying, throws it, refuses to even try it and I can't get it anywhere near his mouth. I even purchased several Mickey mouse ones to see if he would give in. Anyone have tips/advice? I wish I could communicate with him but he hasn't talked yet.