My dad taught physiology and survival training in the Air Force, and later for the FAA. You’re right about this not being very useful in any kind of survival scenario.
You’re going to lose a lot more liquid just digging the hole than you would ever gain from collecting condensation. Pretty much the most important survival item in any scenario is a pot that can boil a couple cups of water.
For the most part, filters are just for taste and mouth feel. Nothing you can make or find in an emergency situation is going to filter out the stuff that’s going to give you dysentery, or it won’t work fast/efficient enough to keep you from dehydrating. Unless you have some iodine or bleach handy, being able to boil water is a must.
My dad taught physiology and survival training in the Air Force, and later for the FAA. You’re right about this not being very useful in any kind of survival scenario.
You’re going to lose a lot more liquid just digging the hole than you would ever gain from collecting condensation. Pretty much the most important survival item in any scenario is a pot that can boil a couple cups of water.
For the most part, filters are just for taste and mouth feel. Nothing you can make or find in an emergency situation is going to filter out the stuff that’s going to give you dysentery, or it won’t work fast/efficient enough to keep you from dehydrating. Unless you have some iodine or bleach handy, being able to boil water is a must.