Day 46-Desert Green
Desert Green was a catalog color only in 1996 and 1997. It has been produced again on several occasions, but not as a catalog color. There should be water bottles in Desert Green with the orange dot label but I have never seen one. Desert green is made by taking a gather of Cobalt glass and encasing it in Topaz but leaving a very thick area of Topaz at the bottom which contains no Cobalt as in this example. Other Desert Green may only have a thin layer of Topaz which encased all of the Cobalt. The green glass at the top is just a combination of the two colors while the bottom is Topaz alone. This produces the 2-tone look of this unusual bottle.
Blog Update: October 22, 2012: Today I received a package and I can now tell you that Desert Green water bottles exist from the 1996/1997 time period. Another minor head scratcher has been solved.
This photo clearly shows the Topaz layer at the bottom of this water bottle.