In a cocktail shaker partially filled with Perrier ice, combine vodka, blue curacao and a good splash of orange juice; set aside. Dip edge of wide-mouth glass, such a s a martini or daiquiri glass in water or orange juice; then dip in plate covered with sugar. Add Perrier to glass, shake contents of cocktail shaker well. Using a cocktail strainer, pour mixture into sugar edged glass..