M.P.
The best advice I received when I was experiencing this with my twins was: Make sure they are safe and not ill, then let them cry. It was the hardest thing I ever had to do. I knew a bottle at bed would cause huge dental issues later and a sleep deprived mommy wasn't making anyone happy. So I took the bottles away and put them to bed. And you know what it only took 4 nights of crying before they realized that mommy wasn't going to come running. Plus no bottle at bed meant they weren't getting up at 2am because they didn't have full tummies falling asleep.