CorningWare Colours Pop-Ins 20-oz Soup Mug with Lid - 2 Pack (Black Licorice) Corningware Mug with a lid is a durable stoneware material and can be used in preheated oven These Mugs with Lids Set are Microwaveable, Dishwasher, Refrigerator, Freezer, Resists Chipping and Cracking Plastic lids are BPA free and Top-Rack Dishwasher Safe Perfect for Soup, Coffee, Tea, Chili,Oatmeal, Hot Cocoa and Baking Mug Measures 6 inches x 4 3/4 inches x 4 inches and carries a 1 Year Limited Warranty. Lids carry a 2 Year Limited Warranty.