Top up with the 15 cl of premium tonic. Mix with the bar spoon.
4.
Express the zest over the glass, rubbing the edges of the glass with the zest.
5.
Use another zest for decoration.
Tip from the pro
Straws are no longer compulsory in modern cocktails, as long as you don't use crushed ice. We use zest to enhance the olfactory experience. A straw would prevent you from enjoying them.