Bring the white wine to the boil with sugar and juniper berries. Then take it off the stove, steep it for about 10 minutes and let it cool.
Soak the gelatine sheets according to the instructions on the packet and dissolve afterwards. Stir in with the gin. Then pass through a sieve and chill.
As soon as the liquid begins to gel, add the tonic water. Fill into small portion forms and chill immediately so that the carbon dioxide pearls remain in the jelly.