It takes way more than one pint of water to make a pint of beer. It's used for processing the ingredients, making the containers and labels and in shipping. This is called embedded water. It's a problem because we (the developed world) are taking water from developing countries- who often have very scarce water supplies- via the goods we import. The water table in China is dropping one metre a year, so they say.
Yikes. What does all this mean? It means that fighting over oil will become an absurdity. What we really want is a long, cool drink of water.