For the gin based version, David decided on 2 oz of Bombay Blue Sapphire gin, 1 oz of blue curacao, and a dash of dry vermouth.
For the vodka Blue Martini, David decided that the blue bottled SKYY vodka should be used, simply replacing the Blue Sapphire with it.
Enjoy the taste of the Blue Martini, and remember, drink responsibly. DON'T drink and drive.