Chipotle Mexican Grill, the international restaurant chain which serves up customized burritos and tacos in an assembly line-fashion, launched an initiative meant to give customers a brief, literary experience by printing short stories on its bags and cups. "Cultivating Thoughts" features writers such as Toni Morrison, Sarah Silverman, Jonathan Safran Foer and George Saunder. But noticeably missing from its lineup are Mexican-American and Latin American writers.