Pomaireware Clay Tortilla Warmer, Small, Leadfree clay that retains the moisture-hot food stays hot. Can be used on the stovetop (electric w/diffuser), oven proof up to 450F., microwave safe Recipe pamphlet provided with each piece. Heat the tortilla warmer in microwave, then add the tortillas, Keeps everything moist. Each piece has its own blemishes and character