By volume increase do you mean the foamy stuff? You should note down what you actually made , not what the foam makes it look like
@Elle I think they mean, if you add 150ml of water to the formula powder, it’ll actually make 160ml of formula
@Becky oh , really ?😅I can never really tell how much is in there as it goes soo frothy!
I put it down as 160 if that’s what it shows on the bottle, not sure if that’s correct but it’s what I’ve always done!