Myself I use Beefeater Gin & Schweppes Indian Tonic but it's all about taste.
From Wikipedia.org:
| Type | Cocktail |
|---|---|
| Primary alcohol by volume | |
| Served | On the rocks; poured over ice |
| Standard garnish | Lime or lemon |
| Standard drinkware | Highball glass |
| Commonly used ingredients | Gin and tonic water, to taste |
| Preparation | In a glass filled with ice, add gin and fill with tonic. Add a lime wedge. |

Alkis! ^^
SvaraRadera