Go water fishing
Don’t let yourself die of thirst because you can’t get to that deep well, this deeply embanked river or that unreachable spring.

Attach your flask to a long rod with a string. You should add some weight at the neck of your flask so that it doesn’t float and fills up.
Get water through condensation
Dig a hole about 3’1/4 in diameter and 20" deep. Try to choose a loose soil. At the bottom, put a container with a small hose. Cover the lot with a large transparent plastic. Put a small stone in the center so as to get the form of a crater. Cover the sides with soil and a few stones to close tightly.

The sun’s rays will create a greenhouse effect and the water that is contained in the soil will condensate on the inner surface of your plastic and progressively sink into your container.
Suck the water up the hose to get the water from the container, that way you won’t have to unmount your system each time you wan’t to get the water out. That way you can get a small amount of pure water since it has been distiled (it vaporated and was condensed).
Be Careful: The water you get with this method is not for drinking. You can use it to wash the dishes vegetables or your hands or just for cooking. It can be used to do your washing up but not for mouth hygiene.