Combine the tomato juice, guaro, lime juice, Salsa Lizano, hot sauce, onion and cilantro in a blender. Add 1 to 1 1/2 teaspoons salt and 1/2 teaspoon pepper and puree until smooth. Pour into a container and refrigerate until ready to serve.
To serve, vigorously shake or stir some of the tomato juice mixture in a shaker with ice until very cold. Strain into 2-ounce shot glasses and garnish with lime wedges.