I posted about the new legal definition of the Caipirinha demanding real sugar, but luckily for these folks, no such legislation exists for the Margarita.
Yes, it is a box of aspartame-sweetened portable Margarita packets that you can take to the bar. From the press release:
According to Johnson, Zilch Sugar Free Margarita Mixers are a delicious
alternative to high carb, high calorie Margaritas. "Before Zilch, I
couldn't enjoy Margaritas with my friends at restaurants. Now, I just
order Tequila and water on the rocks, and add my little packet of
Tequila and water on the rocks? YES. Order that in a Margarita glass with a spoon for stirring and watch the bartender's head explode.