Water is essential in a survival situation. So looking at the broader possibilities of the End of the World -- not just the inevitable Zombie Apocalypse -- we need to consider ways we can carry water while still on the move. Whether we're on short patrols, scavanging expeditions, or long hauls.
CamelBak is one of the leading suppliers of hydration systems. This is video of the range of options made available in 2010.