Hollye, I've always gone with how much is made up. My DD is also on the Nan formula and has been formula fed from 3 weeks old. Yes 5 scoops in 150ml of water makes up the 180ml so I take it as that is how much she drinks.

I love the Nan, doesn't foam up too much and easy to mix up. I hope you are enjoying your lovely DD, she looks absolutely gorgeous! xx