I was boiling kettle, waiting 30 mins, adding to bottle and formula then shaking and waiting for it to cool. Just bought a perfect prep machine now as the above wasn't sustainable for night feeds.
I use nuby. Boil water in kettle pour into bottle then pour water into nuby I leave 2oz in bottle and add formula ( my daughter is on 5oz) and then pour water from nuby into bottle x
We boil our water and pour into a larger airtight bottle and leave out on the bench for any formulas that day/night. The water will remain sterile for 24 hours at room temp so we prepare enough for each day and take from it as needed. We then warm up in our Tommee Tippee bottle warmer and it already being room temp water helps to cut down on warming/cooling time.
I boil my water and use a pitcher and add the formula in right away and then store it in the fridge and then I use a bottle warmer when I need to make a bottle. Most formula is good for 24 hours in the fridge.
I use ready feed for my little one that had lip tie and I had supply issues, my method is honestly I feel the most simple. I use hot kettle water in a cup, pour ready feed in the bottle , place into hot water cup and wait like a minute for it to warm .. I use the drop in liner bottles so it's so fast and they are easy to clean! The reg bottles are slow to heat this way