A grappa based lemon liqueur, the Acqua di Cedro is made distinctive by Nardini's use of Cedro lemons instead of regular ones you could find in the supermarket. If you're not sure what they look like, we guess it's the oddly shaped, bumpy thing on the label. If you're also wondering what difference the Cedro lemon makes, it gives the liqueur a uniquely dry after taste and clear appearance. What a clever little lemon.