gwynndolin:

Boss, that’s water, also known as H2O. You should try drinking it.
Locals in the area claim that it has healing powers that lead to longer
lives and healthier skin, which means you can take more bullets before
needing help. Also, if you roll around in it, you can clean your body
off, to make some of the smell of war go away. You can typically find it in large bodies of water, called oceans, but that water is a little more dangerous to drink. Try finding a “stream” or “lake” with clean water to drink from. You’re more likely to survive without consuming any bacteria.

Hmm.