The form of liquid water is contingent upon the characteristics of its container. It conforms to the spatial limitations imposed by any containing vessel. Without such containment, water disperses, lacking the ability to maintain an independent, fixed geometry. For example, water poured onto a flat, impermeable surface will spread until surface tension and gravitational forces reach equilibrium.
Understanding the behavior of liquids under varying conditions is fundamental across numerous scientific and engineering disciplines. This knowledge informs the design of hydraulic systems, fluid transport mechanisms, and various chemical processes. Historically, the study of fluid dynamics has led to significant advancements in areas such as shipbuilding, aviation, and weather prediction.