This is naturally exhausting for her, as well as for me. I almost suspect that the reason she is sometimes willing to take the bottle for a short time is purely so that she can refuel and re-energize in order to renew the fight. She's like a guerilla band raiding an army outpost to steal arms and supplies.
Why am I putting so much effort into getting her to take the bottle? I don't really have a choice. I need her to take the bottle because otherwise I can't feed her, during all the long hours when my wife is away at work. In just a couple of months, my wife is going to be gone at school for a whole week, and I just don't have any option but to overcome the bottle issue before that happens. My daughter is blessed with an abundance of “sisu,” the Finnish national characteristic of heroic stubbornness, otherwise I would have succeeded long before now. It's her sisu against mine, and only time will tell who the victor shall be!