Cocktail Recept: Grapefruit aperitif

A Grapefruit aperitif cocktail contains the following ingredients:

• 60 ml. Vermouth 
• 15 ml. Grapefruit juice
• 1 bit Soda water
• 1 bit Ice
• 1 slice Grapefruit

Fill a whiskey glass halfway with ice. Pour dry vermouth, sweet vermouth over it. Top up with soda water. Garnish with a slice of grapefruit.