Since 1982. Mexico's no. 1 best seller (based on a syndicated market study in Mexico). Ready in 60 seconds. A story of success! In 1982 la Sierra became Mexico’s first brand of canned beans and offered its unique and authentic homemade flavor that consumers have loved for generations today this same delicious recipe lives on making la Sierra Mexico’s no 1 selling ready-to-eat bean brand! Dispose of properly.