Aluminum, Anodized Aluminum, Etched Aluminum, Bright Aluminum, Stainless Steel, Titanium, Anodized Titanium, Nickel Silver, Neoprene:All of these pieces may be cleaned in a normal dishwasher run, remember to not use cleansing agents with a citrus content.With etched aluminum, the etching may eventually come off in cleaning. If this occurs I have been informed that you can re-etch the aluminum in a water/oxi-clean solution. With pieces containing neoprene, if the item is to be washed frequently you will want to hand wash it in warm, instead of hot, water