night feeds -7mnth old

[toddler06]

Well here i am at 5.45, and i am trying to get DS (7hakf mnths ) to go back to sleep..
DS is on a great routine, but he is still waking twice a night for a bottle, i know he can sleep more then 4 hrs at a time, as he has done 7 & 8 hr stints in the past. I go back to work in a few weeks time so i am trying to get his sleep sorted.
During the day DS will have 2 huge sleeps, of about 1 half hrs each. Goes down for the night at 7pm, will drink appr 270mls, then he will wake between 10-midnight and drink another 200mls.. without fail he wakes between 4 & 5 and expects another bottle of 200mls. if i do give it to him, he then only sleeps an hr. I dont think he needs about 700 mls between 7 & 7.
Also i dont know if it is milk intake, having appr 1000mls a day which is ample, but each meal he will only have about 6 teaspoons of food..when i feed him..
So i am trying to get him to sleep from the night feed thru til at least 6.30am, I know it is going to be hard, but it needs to be done. I cant be starting my day so early each day especially when i have a 2 year old as well. Any siggestions. I have offered him water, and it did work last week but not so far today/tonight.
Any suggestions/ help