react with the alkaline environment created by some dishwasher detergents. Repeated exposure may cause discoloration, corrosion, or pitting.
Even when an aluminum item is technically labeled dishwasher-safe, checking the manufacturer’s instructions is worthwhile, particularly for cookware with special finishes.
Copper Cookware and Mugs
Copper is beautiful. That warm glow is hard to beat.
But dishwasher detergent and high heat can dull copper and damage its finish. Over time, the appearance may change substantially.
That Moscow Mule mug deserves a gentle hand wash if you want to preserve its finish.
