Beer, Spruce and Grapefruit Cocktail

Name: Beer, Spruce and Grapefruit Cocktail
Prep time: 5 min
Total time: 5 min
Yield: 1 serving(s)
Ingredients: 1/2 cup (125 ml) ice cubes; 4 oz (125 ml) West Coast IPA-style beer, cold; 4 oz (125 ml) spruce soda, cold; ½ oz (15 ml) store-bought grapefruit syrup; ½ oz (15 ml) lemon juice; 1 rosemary sprig