Maybe a silly a question. . But Can I use a bottle of water ((purified)) to mix babies formula for…

Maybe a silly a question. . But

Can I use a bottle of water ((purified)) to mix babies formula for his next bottle my baby jug water just ran out. But not sure if it's the same thing..

Won't have time to boil & cool tap water. Plus when I did that 2xs the other day I notices a film still on top the water after it cooled so I dumped it.