Thirst addon adds another dimension of realism to Minecraft PE by making water consumption obligatory. Before, your character in the game would only experience hunger but no thirst. This is actually funny because the human body can live less without water, than without food.
How to get fresh water
Freshwater supply can be solved simply by living by the river and diving in the hour of need to refill the thirst bar. However, it’s not the most convenient way, and it limits your ability to travel far. A proper water reservoir would solve that problem.
Use all devices and methods to keep your thirst meter full, otherwise, your character can face death.
Enable all Experimental options in the world settings.