cocktail notes

2 oz rum
1 oz red grapefruit
1/2 oz lime
version #3: 1″ x 1″ x 2″ very ripe pineapple core, cut into pieces
version #4: 1/8th of a small ripe peach
1 tsp sugar
short drizzle maraschino liqueur
4 drops grapefruit bitters
muddle fruit with sugar. combine remaining ingredients, shake without ice for 20 seconds, shake with ice for 20 seconds. [...]