The Ruby is a cocktail made with vodka, red aperitif, elderflower liqueur, ruby red grapefruit juice, lemon juice, and egg white, bringing together a host of unique flavors in delicious harmony. The two types of bittersweet flavor, from ruby red grapefruit and red aperitif, play off each other to create a drink with depth and complexity. Vodka rounds out the bitterness, while the sweet florals of elderflower liqueur add another dimension of flavor. The color is a vibrant red pink, making it a striking cocktail for a romantic dinner or for an elegant evening with friends.