This is not stored water and there is no substitute for that. You need stored water in an emergency situation. This is the capability to store water after the fact from rain or out of the faucet if water it still available at the start of an emergency situation.
I recently increased my water storage capability (not stored water) by 140 gallons for about $30.00. Here it is:
http://beforeitsnews.com/self-sufficiency/2013/01/expandable-emergency-water-storage-2450866.html
This is not stored water and there is no substitute for that. You need stored water in an emergency situation. This is the capability to store water after the fact from rain or out of the faucet if water it still available at the start of an emergency situation.