Earlier quoted context omitted.
We took an approach that served us well but got unlimited judgement from others - cold bottles. Took almost no time to train and a tap is usually available.
What is the argument for and against it?
Against: Nothing really, I guess the baby might not drink it (in theory they’re expecting warm breast milk). It’s not recommended to use straight tap water here, only filtered, due to bacteria which is harmless to older children/adults but could be a problem for a newborn.