Put some lemon juice in a small bowl and put the sugar on a plate. Dip a long drink glass with the rim in the lemon juice and immediately afterwards in the sugar, this creates a delicious sugar rim.
Pour the first 6 ingredients into the glass and fill the glass 2/3 full with red currant juice. Fill in the last third with Sprite. Add ice cubes if necessary.
It tastes best with homemade lemon syrup: Boil 100 g sugar with 200 ml water, zest of an organic lemon and the juice of the lemon together while stirring until it bubbles. Chill in a sealable container.