A lot of the time they are not hungry and it becomes habit. Some people don't do it, but cry it out method and they will go back to sleep. Couple nights of that will help break the cycle. Unless they are really really crying than I wouldn't do it.
@maxie he drinks about 8 oz before bed still wakes up he goes to sleep around 8-9 and wakes up at 11 and 3-4. Then around 5-6 gets cranky but doesn't want to wake up just wants to be held. I thought by this age I would be getting more sleep lol