Originally Posted by
mthayer
if you are going to be storing water in the bags for any amount of time, get a bag sunlight cannot penetrate. Sunlight will cause bacteria, and mold to grow rendering yoir water unsafe to drink. That's just somethink to think about.
There are plenty of bacteria that can grow without sunlight, and mold cannot photosynthesise. If anything, sunlight would reduce the growth of mold. I wouldn't let that be the deciding factor.