Add vodka and grapefruit juice to a cocktail shaker filled with ice.
Cover and shake until chilled.
Strain into a chilled martini glass.
Garnish with Sliced Grapefruit or grapefruit twist.
Notes
Tiffy's Tips~Use your favorite good quality vodka.~ONLY use fresh grapefruit juice.~Chill your martini glass. Slightly wet the glass and place in the freezer for a few minutes.