Tbh it would be worth trying both. Obviously sippy cup is helpful in the long run but the suction from the bottle might soothe her ears. If she's still BFing then she'll prbably be quite happy to latch if she is hungry.
My DD has only had breast. I'll be taking her on a flight with me when she's nearly six months. She's flown before when she was three months and she fed fine apart from when she refused to latch for one of the take offs. My concern this time is that she won't latch and the airplane pressurization after take off will affect her. I'm debating on whether or not to introduce a bottle so that when we come to fly I can give her this instead of trying to get her to latch. I'm after some advice on whether she would take to a bottle at this age or if I should just go straight for a sippy cup?