These mugs date to the late 1970s, having the “Oven-Proof” embossing as well as the “morse code” dots.  As far as I know, all available colors are represented here.  One of the more common advertisers using the Cola shape was White Castle.   These mugs are getting harder to find and gathering a complete set can take some time.  

The cola mugs in primary colors.

Coral is probably the hardest to find in this set.