Thanks christy. I just realised today that wyeth, the company that make S26 have a helpline so I gave them a call and asked what I needed to. The girl I spoke to said the water just needs to be room temp. and that it is best made up right before it is used rather than in advance #-o . Not great for night feeds, but never mind. Last night I gave Hudson normal S26 for his 4am feed and ended up having to change his whole bed because he vomited all over it as soon as I laid him down, so I guess it's better to spend the extra time making up the feed rather than having to change his whole bed at 4am lol. I think I might do what you suggested and just microwave the bottle of water from the fridge before adding the formula as that would take it to room temp pretty much anyway. Thanks again. Oh, another question. Did you have to battle matilda to drink when you changed to reflux formula? Only asking as Hudson screamed his lungs out the whole way through the first feed of thickened formula. He is gradually getting better, but he still doesn't want to drink it. I am guessing maybe he doesn't like the taste or texture or something, but I suppose he will get used to it.