Ice.

[zabado]

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.

[Hopkirk]

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.

[Hopkirk]

Oh and no. Freezing water doesn't sanitise it.

[Gizmonster]

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.

[TheChair]

Most of the bars and restaurants that I know buy prepackaged ice cubes in bulk from the same wholesalers they use for their drinks.