CorningWare 20-Ounce Meal Mug with Vented Lid is perfect for microwaving coffee, tea, soup, oatmeal, and much more. | Vented lid allows steam to escape, keeping the microwave clean and preventing burns. | Durable stoneware material resists chipping and cracking. High-gloss exterior is non-porous, easy to clean, and won't absorb flavors, odors, or stains.Do not use abrasive cleaners, scouring pads, or any object that will scratch stoneware items | Mug is dishwasher, freezer, and microwave safe. BPA-free plastic lid is top rack dishwasher, refrigerator, and microwave safe. | Stoneware mug comes with a 1-year limited warranty. Plastic lid comes with a 2-year limited warranty against manufacturer defect.