This is another one-of-a-kind water bottle. The best I can tell is that it is the fire and ice colors made into a water bottle. It appears to be Yellow in the inside of the neck of a Cobalt water bottle. Subtle and beautiful, I wish Blenko would consider more of these two tone water bottles. Etched 2012 on the base.
About a week ago, I received another photograph of a 2-toned water bottle that is even more unusual than this. It will probably be early May before it makes it into the blog. I was in awe when the photo arrived and believe that you will be as well.