How to correctly make formula powder bottle?

Denise

For the first two months I’ve been using ready to feed formula since we had some minor complications and was told rtf would be better since my baby was recieving antibiotics now i am ready to start powder formula.

My question is do I boil the water even if it’s bottled water ? And then let it cool down for 30 minutes can I still use the rest of the water of put in a thermo after to keep the temperature?

Or can I simply just take bottled water in the bottle with the formula?

I don’t trust my tap water so that’s why I’m choosing bottled waters