Cuba has quietly opened a first-of-its-kind store specializing in bulk goods in Havana: Zona +, a high-ceiling space with racks stacked with large tins of tomato sauce, toilet paper and cooking oil by the gallon.

It’s not quite Costco, and it falls short of satisfying long-standing calls for a wholesale market to support the growing class of small-restaurant and -cafeteria owners who have set up shop under President Raul Castro’s economic reforms begun six years ago.