Not Legal Advice: A margarita mix is a premade mixture (non-alcoholic mix) mainly containing sugar, water, and lemon/lime juices or puree's, by which alcohol is then added by the consumer.
In some states, underage person can legally purchase a beverage that contains less than 0.5% alcohol by volume. The legal definition of an ‘alcoholic beverage’ is "a compound produced and sold for human consumption as a drink that contains more than 0.5% of alcohol by volume.”
For information about the alcohol laws in your area, please visit FTC.gov.
A good host remembers to stock up on beer, wine and liquor, but a great host remembers to provide a non-alcoholic option, too. Check out these 20 non-alcoholic party drinks everyone will love shared by Tablespoon.com.