Day 100-Kiwi Diamond Optic Large
This is another diamond optic water bottle with the large diamond pattern on it. All of these that I have seen were etched with “Blenko 2010” on the bottom. This leads me to believe that by 2011 the glass blowers had the diamond optic perfected (or the small Diamond Optic pattern was chosen as the standard.) If you like the large diamonds, get them while you can. They will be rare.
Blog Update-November 28, 2013-Initially there were two different molds used to create a diamond optic pattern. Blenko decided sometime in 2011 to eliminate the large diamond optic variety.