Campirinha
MUDDLE lime and grapefruit in base of shaker to release juices. Add other ingredients, SHAKE with 6oz scoop crushed ice and pour all without straining into glass.
[['1⁄2 fresh', 'Lime (fresh) (chopped wedges)'], ['1⁄4 fresh', 'Ruby red grapefruit (chopped wedges)'], ['6 cl', 'Italian red bitter liqueur'], ['1.5 cl', 'Sugar syrup (65.0°brix, 2 sugar to 1 water rich syrup)']]
[['1⁄2 fresh', 'lime'], ['1⁄4 fresh', 'ruby red grapefruit'], ['6 cl', 'italian red bitter liqueur'], ['1.5 cl', 'sugar syrup']]