How Big Tequila is fighting to make sure you never fully know what's in your margaritas

The founders of Tequila Matchmaker are on a mission to help consumers identify "additive-free" brands. Problem is, no one can agree on what that means. At a recent tequila tasting event held at IXTA, a Mexican hotspot in Manhattan's Lower East Side, Grover and Scarlet Sanschagrin lament that too many tequilas sold on shelves today contain artificial sweeteners and other additives.