Promotional Mugs, 11 oz Full Color Stoneware Executive Mug - Grade A & Microwave Safe, Grade A mug: materials that meet the highest standards Although this item is dishwasher safe we do recommend hand wash only to get the most life out of your new favorite mug. Not suitable for cleaners such as bleach or chlorine when cleaning the product. Best value for a high quality mug Patented materials deliver vibrant colors Microwave safe. ... #1011 $4.90/each.