Grapefruit and Orange Cocktail

Ingredients:
1/2 a fluid ounce or 1.5 centilitres of Orange Juice
1 & 3/4 fluid ounces or 5.25 centilitres of Grapefruit Juice
1 & 3/4 fluid ounces or 5.25 centilitres of Grapefruit Juice
Instructions:
Mix and stir with ice in a mixing glass, strain off into a large cocktail glass.
