Made of unglazed clay making them completely natural and safe and containing no toxins or lead * Can be used in the oven, microwave, or gas and electric stovetops, and can go directly to the table for a sophisticated presentation * The pieces heat very evenly and retain heat for a long period, and the porous nature of the unglazed clay allows the slow evaporation of steam and produce food that is healthier, tastier, and moist using less fat * Totally handmade in the traditional manner, by families in a small village on the banks of the Magdalena River in Central Colombia, with each piece being hand burnished with a stone, then fired giving them the distinctive black color and elegant look * Each piece comes with a product information sheet outlining the Uses and Care for the product