Blenko Glass #7736 Tangerine Bottle From the Blue Top Mountain Series. The Blue Top Mountain series was a Don Shepherd design added to the catalog in 1977. It was offered in three colors: blue top, crystal, and wheat, but not offered in tangerine. In this color the bottle is an oddity. The top is folded and crackled. It's almost 9 inches tall 3 1/4 inches in diameter at the bottom. On close inspection, there is an area with very small, very light scratches, but there are no chips, cracks, or water damage. The pontil mark is fire polished.