I suppose i'm coming from the point of view of someone who used cooled boiled water from a jug in the fridge to speed up the bottle process, which I know isn't how you are meant to do it, but to follow the instructions on the formula box to the letter meant anticipating LO being hungry at least half an hour before hand, as you have to boil the jettle, let it cool down to 70 degrees, then add formula and flash cool. I know my child isn't predictable like that, so it ended in her screaming hysterically waiting for her bottle, and there's a lots of research to say that a baby crying hysterically for half an hour does them harm, Never mind the effect it had on me, so i made a decision that seemed best for me and my LO.
And then when you see the American women on here who never sterilise water I think why are different countries giving such different advice?
I got really good advice from a lady in the FF forum here about how to do it safely but quickly, and it's super easy.
Let's say your LO eats 6oz. You boil water, put 3oz (so half the amount of the feed) in a bottle, put the lid/teat on, stick it in the fridge so it gets cold.
When your LO is ready to eat, boil the kettle, let it sit for a sec when its done, put 3oz into a different bottle, put all of the powder in (so in my case six scoops into 3oz of boiled water, so it's double concentration). Put the lid on and shake it. This kills the nasties.
Then grab your other bottle from the fridge with the cold 3oz of previously boiled water, dump it in the other bottle, shake, and it's the perfect temp with no nasties.
Then while you have an empty bottle sat there, fill it with 3oz of water again and stick it back in the fridge for the next time.
I only do 1-2 bottles of formula a day and I find this really easy to do, may be different if you're exclusively FF but may be worth a try.
I know there is sooooooo little chance of anything happening but I was happy with the procedure above.