Does making ice cubes sanitize the water ?. I've been told that bars and restaurants in foreign countries use bottled water to make their ice but I believe they just use ordinary tap water.
When I worked as aircrew, I regularly stayed in Mumbai.
The quality hotel we used always left two glass bottles of water in the fridge, which I drank rather than the tap water.
One visit there was only one bottle. When it was empty I rang and asked for another. The man who came gave me a very funny look, went into the bathroom and filled the bottle from the tap.
As far as I'm aware, freezing water doesn't sanitise it.
I remember going on holiday ages ago and being advised not to have ice in my drinks, as there was a tendency for the locals to just use tap water.