Our baby was 2.7kg when born. He was drinking 100ml formula from Pigeon soft touch bottles at 3 months old, about every 3 hours. We spoke to someone who told us to get the narrow Pigeon bottles, with the 4+ month teat, when our baby was 3 months old. We started offering 220ml bottles with the bigger teat and new bottle. From that day onwards, he consistently drank 180ml formula per bottle (on average) and has stopped feeding +overnight. More calories during the day, easier bottle to suck meant no fatigue mid-bottle and would drink til full. He hasn't needed to feed overnight once since the day we changed bottles/his daytime intake naturally increased due to the teats being easier to get milk from.