Hey ladies thanks for starting this thread. DS1 is 12 weeks old and FF since 10 days old after BF nightmare.
I felt massively guilty and upset when I gave up BF - i had no idea it was going to be so hard. The birth (of 9lb 3oz DS vaginally with just G&A) was a complete piece of piss compared to the 10 day horrowshow of breastfeeding which followed.
Anyway, DS is now thriving and loves his bottles and I just thank god that I live in this century and that formula is available as an alternative when BF isn't working out for whatever reason. I didnt see the other thread you're talking about, but I am think it's outrageous that anyone would try to make me feel any more guilty than I already do about not being able to BF my son!! It was a tough shitty decision I made, but ultimately DS was instantly more settled, happy and put on weight and that's what matters.
This is how I do our night bottles:
Before I go to bed I make them up using hot, recently-boiled water from the kettle as-per the manufacturers instructions. I then quickly cool the bottles of formula down in icy water, and then shove them in the back of the fridge. When DS wakes for a night feed, I get a bottle out of the fridge, remove teat/lid, microwave it for 30 seconds to bring to room temperature, give it a good swill round, then microwave again for 20 secs so it's nice and warm how DS likes it.
(I know the advice is against microwaving, but that is only because of the risk of hot spots/scalding - not cos of any inherent risk in heating the milk that way....i always swill it around very well to disperse and hotspots and sprinkle it on my tongue - gross! - to check it's not too hot before serving to my son).
Incidentally, during the day if we're going out an about, I take a thermos flask with hot water from the kettle which has cooled for 15-30 mins as per the manufacturers instructions. And I measure out the right number of scoops of formula into a little formula storage tub from Boots. The when DS needs feeding, I simply get a sterile bottle out of my changing bag, pour in 6oz of hot water from my flask, add the powder, shake, wait for it to cool for few minutes, and serve!