I quite agree, WB. I have desert blood and other unique metabolic properties that can skew my idea of requirements.

I think what I was trying to convey was that a 4 litre capacity was a bad idea on both ends of the spectrum:

* It is too much water to carry all of the time

* It is too little water to carry for the whole trip


The body betrays and the weather conspires, hopefully, not on the same day.