Newborn parents that are doing formula….

This is my second baby but we did things a little differently with our last. He was mostly formula fed. I think in the beginning I could only pump a little colostrum and my milk never came in. Now with a second and a toddler I’m planning on doing the same. Giving what I can and then formula for the rest.

My question is: do you just make the bottle every night and warm it in the warmer?

In the beginning, we made a picture of formula each night and we would just pour 2-3 oz in the bottle and then warm it. Now I’m like…should we just pour the purified water and then mix the formula in and warm it?

Not sure what is easier? What do you guys do? I guess it just nervous for the nightime feeds and wakings again