These ads are all over the Muni stations right now. They're promoting some new upside-down ice-cream cake product.
Not sure who has more street cred with San Franciscans: Rice-a-Roni, which is now part of Chicago-based Quaker Oats Co., or Vermont's Ben & Jerry's, which irked hippies (or hipsters?) by putting a store at Haight and Ashbury. (By the way, Ben & Jerry's considers that location "the most famous Ben & Jerry's scoop shop in America.")