Old fashioned water (no longer available).
Water: A colorless, odorless, tasteless liquid that is a perennial favorite, for some reason.
Water sometimes comes as vapor (known as steam) or as a solid (ice), which hurts when you fall on it.
Water in the back country may have very, very small critters living in it, so small that they are visible only to scientists with advanced degrees. Sometimes these critters (water cooties) make a hiker sick. To avoid this, hikers often boil drinking water or carry chemicals or filters to purify water.
Water is essential for hikers because they like to drink lots of it, lacking anything else to do besides walking, and that gets old.
Water is also normally added to most hiker foods which are often made inedible by a process known as drying.
Trendy new water (in handy, lightweight containers).
Water: Dihydrogen monoxide (DHMO). This is a colorless and odorless chemical compound, also referred to by some as dihydrogen oxide, hydrogen hydroxide, hydronium hydroxide, or simply hydric acid.
The uninitiated refer to it as "water."
Its basis is the unstable radical hydroxide, the components of which are found in a number of caustic, explosive and poisonous compounds such as sulfuric acid, nitroglycerin and ethyl alcohol.
Its chemical formula is H2O. DHMO is a constituent of many known toxic substances, diseases and disease-causing agents, environmental hazards, and it can even be lethal to humans in quantities as small as a thimbleful, if inhaled.
For more information:
Bernard Foods dehydrated water
From: Fire In Your Hand