FTM using powder formula

I’m a new mom, so forgive me if this seems common sense.

What kind of water should I be using to make a bottle with powder? I read so many different things such as bottled water, distilled water etc.

little one usually drinks the premade formulas but we’re slowly moving to powder to help save on costs. We also have a bottle warmer that we intend to use with the powder formula bottles. But again just want to make sure I’m using the right water for the bottle.