First of all, place six martini cocktail glasses in refrigerator until chill properly.
Meanwhile, take a cocktail shaker and place 1/2 cup of ice cubes in it.
Pour in 375ml properly chilled vodka into your cocktail shaker. Now, shake the ice cubes and vodka for approximately one minute until both ingredients mix thoroughly. Make sure not to shake it vigorously. Set it aside for few second at room temperature.
Take out the martini cocktail glasses from refrigerator and divide the 125ml dry vermouth equally among them.
Place one risen Sicilian green olives in each of the martini cocktail glasses.
Now, gradually pour the vodka martini cocktail into the glasses. Serve immediately.