Whataburger has partnered with hot-sauce maker Cholula on a spicy ketchup now available on grocery shelves, officials with the San Antonio-based fast-food chain said Tuesday. The two companies first released the fiery collaboration, then called Spicy Ketchup Limited Batch #2, as a limited-edition condiment in Whataburger restaurants. The new bottled variety marks the first time it’s been available in grocery stores.