My 11 month old will only drink out of my water bottle - or a cup. She won't drink out of a sippy cup and has never ever had a bottle. I am worried as well and thankful she nurses all the time. I will try the cups pp recommended.
We cosleep and DD nurses all night long. I have no idea how much because I don't wake up for it really. She goes to sleep at 7pm and sleeps until about 7am. With maybe a 1.5 - 2 hour nap mid morning.
Definitely try co-sleeping!!!