CS>CS and emergency drinking water

[Medwith, Robert]

Thinking about puting some Emergency Water away on shelf (distiled water
from my distiller).
Water would be in 2 to 3 gallon containers. How long would it last with a
little CS in water.
Also thought about cleaning some pennies and melting a drop of pure silver
on one side and then putting one in each jug.
Would the silver coated penny affect the dringing water, in long or short
term.
 
 Bob