1 1/2 oz of gordon's gin
3/4 oz of Rose's lime juice (or Lime Juice)
6 oz of 7-up soda (or Sprite)
Fill a collins glass 3/4 full with ice. Slowly add the lime juice , then bulid with gin. Slowly fill with 7-Up leaving green and clear layers intact until just before drinking. Garnish with a twist of lime on a bamboo skewer, and serve.