Bags of Water
(not because one didn't already know it)

Hydration:
The Human Brain is 75% water.
Moderate dehydration will cause headaches and even dizziness.
Hydration regulates body temperature.
Allows the immune system to function well.
Mediates nutrient & oxygen transport to every cell in the body.
Assists the body's absorption of nutrients.
Mediates removal of wastes.

Water:
Facilitates conversion of ingested foods into energy.
Protects and cushions vital organs.
Cushions joints.
Muscles are 75% water.
Bones are 22% water.

Water to else ratio in the body mirrors the water to else ratio of Earth.