In fact, stateside bars have larger selections of regional mezcal made with agave tequilana variedad azul (or blue agave) than you’ll find in Mexico. Plus, a few recommendations for the best well tequilas for margaritas, and a look at the newer style known as cristalino. The finished tequila must have a minimum of 51 percent blue agave, although the majority of tequila is 100 percent blue agave, allowing for up to 1 percent additives. In recent years, the CRT has allowed brands to add up to 1 percent additives to 100 percent blue agave tequila without disclosure. The best silver (aka plata or blanco) tequilaSilver tequilas are both valued as sipping tequilas before a meal and for making cocktails.