Crafted by hand using the sand-casting method, every Beatriz Ball metalware item is made with an aluminum alloy that maintains its shine and resists tarnishing. It's safe for both the oven and freezer, as well as being completely food-safe. To clean, refrain from cutting on the surface or using harsh scrubbers or solutions. After handwashing, dry immediately with a soft towel. For acidic or salty foods, lightly oil the surface before use. Avoid storing food on the surface or allowing water to sit for prolonged periods of time.