Perry, probably about a 1/4 teaspoon in a bottle...simply a pinch. Sits in the bottom of the bottle, if you were in trouble, I can pretty much guaranty you would drink it...the problem is those people that realize after they have been hiking an hour that they missed judged things and need some extra water to make the hike..like you said zip, its not a grey area...the boxes are for people that are truly in trouble..
What has been really good to see is that there are more people starting to take water TO the boxes....its a good addition to a workout anyway..
