Someone I know was on about introducing a bottle a night for a dream feed but I was thinking if it is possible to do this by breastfeeding you wouldn't need to bother with the bottle.
I have warned her it's best not to introduce a bottle as often as once a day if they are going to be awake. I remember someone on here telling me from 4 months they gave a bottle every night at 10/11pm so the baby was awake but still sleepy and drowsy and he soon started rejecting the breast :(
It would probably be OK once you have started weaning and they are used to breastfeeding a little less anyway.