A class action lawsuit accuses Costco of false advertising when it comes with its Kirkland tequila. Mexican law requires tequila to be made from at least 51% blue agave, but tequilas made with 100% blue agave are considered higher quality. The Kirkland brands are advertised to be made with 100-percent Blue Weber agave. But a lawsuit says testing confirmed the tequila contained so much sugar that they wouldn’t qualify as tequila. The lawsuit claims Costco is violating laws in both Mexico and the