In that case for a marg why not use a lime wheel. More visually stunning, and
the guest is less apt to squeeze it into their drink. The truth is that most
people either put the garnish into their drink, put it on their cocktail
napkin, or eat it if it's not too sour. Why not give something that at worst
looks better than a simple lemon wedge and at best adds to the complexity of a
drink.