How To Survive The Apocalypse
Winona’s Dad Says: The minimum requirement at low energy output is one gallon of water per person per day. At 8.35 lbs/gallon, it is daunting to contemplate carrying 25 lbs of water even if the weight goes down by its consumption over three days. Having the means to render found water safe extends your range and ability to function but there are downsides: boiling is energy and time intensive but generally effective; chemical treatment requires a good knowledge base, and the bad taste can get in the way of drinking enough water; physical filtration is often too slow.
Winona Says: Allow me to summarize with a pun: water is totally worth the weight.