OP - I think you will find this article useful.
It's called "I won't ask you why you didn't breastfeed".
It is possible to be pro-breastfeeding without being anti formula-feeding!
There is nothing you can do now or say to change the fact that your friend is FFing.
In the future if you have friends who are PG you can lend them a book which is pro-BF or print out a list of useful links on BFing.
I passionately believe that you must not judge any individual for their feeding choice. You can judge "the system" i.e. the FF culture that there is in this country.
Direct your energy into eg supporting Baby Milk Action.
With regards to the preparation of formula - please do print out the following leaflets and then just leave them with her.
FSA leaflet.
WHO guidelines.
UNICEF guide to formula.
Maybe let her know that you are aware that the advice given to FFers is very very poor.
"why, if you are going to ff, you can't even follow the instructions to safely make it up." - again don't judge your friend - judge the HCPs who have not properly explained the risks/safe methods of preparation.
Judge the formula companies who IGNORED the recommendation from the Food Standards Authority to put the advice about the 70 degrees on their packets (instead opting to just say boil water and leave for 30 mins).
For those of you who are unaware - formula powder is not sterile. The manufacture process cannot guarantee to remove all bacteria. This is different from ready to feed liquid formula which has been pasturised and is sterile.
The bacteria which are sometimes found in formula are not ordinary household bacteria but as ViveLeFrak explained up thread they can be lethal - causing death or serious brain damage. Babies at most risk are new borns especially pre-mature or low birth weight and immuno-compromised babies.
Yes, the risk is low - BUT - most of us (given a full understanding of the facts) would not want to take a chance and prepare our babies sole source of nutrition in a risky way. People are normally much more compliant with the instructions on how to make up and administer medicines - but not formula.
To be fair it is is a fucking disgrace that the NHS and HCPs do not explain the safe preparation/the reasons for this/alternative methods of preparation. I am hoping to find the time to campaign on this issue in the near future.