This cocktail is perfect for a sunny day on the patio with its crisp and refreshing taste. To start, combine 1.5 oz of tequila, 1 oz freshly squeezed grapefruit juice, and 0.75 oz honey syrup in a shaker with ice. Shake vigorously and strain into a salt-rimmed glass filled with ice. Top with 1 oz of sparkling water and garnish with a slice of grapefruit and a sprig of rosemary. The herbal notes of rosemary perfectly balance the sweetness of honey syrup while the grapefruit juice adds a refreshing zest to the tequila. Enjoy the burst of sunshine in every sip!