Watch and learn this skill, it could save your life. Imagine being in the wilderness for days and there is no drinkable water to be had.
Nasty, infested water is available but you have no purification tablets, no ability to start a fire for boiling water. You just don’t have any of the conventional methods available to make that water drinkable.
We can only survive 3 days or so without water. Will this be your end?
You still have an option. There is a way to distill the water through an evaporating process.