Grapevine Trivet from Arthur Court Designs. This beautifully crafted trivet from Arthur Court is decorated with grapes and grapevines. This 8" Dia. trivet will make a great addition to any table. Arthur Court aluminum serveware is not dishwasher safe. The brilliant polished luster of your aluminum will be permanently dulled by the high heat of a dishwasher or oven. Just use mild dishwashing soap and dry immediately. Your aluminum serveware will rarely need polishing. As needed, pieces can be brightened with silver polishing compounds.