Also I did not make any claim relative to storing water in a non-clear container. SODIS technique is used to purify the water, If you store water in plastic containers the primary reason you store plastic containers in dark area is not because Sunlight makes bacteria grow where their is none to start with, it's because Sunlight can cause plastic to degrade over time.

Also I did not make any claim relative to storing water in a non-clear container. SODIS technique is used to purify the water, Then if you are going to store it in a non clear container for long periods, you probably need to keep it cool to prevent bacteria from booming.