You have got a point there, a very good scary point. I don't really drink any soda but I've been having my parents save their empty bottles for me to fill with water, not to mention I have a Katadyn Hiker Pro when I'm in the sticks. But yea, for urban areas, gotta have the clear stuff stocked...
As to your dream... I believe that the subconscious mind is incredibly powerful and that dreams should not just be pushed aside. Not that EVERY dream will happen in real life, especially not as it happens, say if you are being chased around by a giant soyburger, but it still probably has an underlying message.