What is hard-anodized aluminum?

Anodizing is a process by which a layer of extremely hard aluminum oxide is applied to the surface of aluminum. This layer protects food from bare aluminum and helps protect the surface from wear. That said, even anodized surfaces eventually wear, and we recommend that you use non-metallic utensils and low-abrasion scrubbies with your Jetboil. When packing a Jetpower canister inside the cooking cup, we recommend that you dry the cup well and separate the two with a layer of cloth to prevent scratches. Keeping the fuel cap on the canister also helps reduce wear by eliminating any movement of the canister or burner base within the cooking cup.  more