Originally Posted by
zeo_max
Read the picture above, from the Camelbak website. They say the body absorbs cold water faster.
You know that humans evolved in nature without refrigeration? I'm sure humans are able to hydrate just fine with warm water.
It is an American thing to ice every drink. In most of the World people drink drinks just at room temp (I realize the rest of the World is Americanizing in this regard..... but not based on actual hydration science). In Germany a cold beer is one from the basement at basement temperature.