The ruby cocktail is a refreshing and vibrant drink that combines the flavors of grapefruit, lime, and cranberry. The grapefruit juice provides a tangy and citrusy base, while the lime juice adds a zesty kick. The cranberry juice adds a touch of sweetness and a beautiful ruby color to the cocktail. This drink is perfect for any occasion, whether you're hosting a party or simply relaxing at home. Garnish with a slice of grapefruit or a sprig of mint for an extra touch of elegance.