1/2 oz of grenadine syrup
3 oz of sweet and sour mix
1 oz of Bombay Sapphire gin (or Gin)
2-4 oz of 7-up soda (or Sprite)
Pour the gin, grenadine and sour mix into a cocktail shaker half-filled with ice cubes. Shake and pour (incl. ice) into a collins glass. Top with 7-Up, add a cherry and serve.