stainless brownie pan: 11 Thing You're Forgetting to Do
https://chancenpnj212.skyrock.com/3324867694-20-Things-You-Should-Know-About-stainless-steel-oven-pans.html
I love these! They won't ever rust and also have no chemicals to leach into your food. Possibly every year I clear my stainless pans with oven cleaner, and back to sparkle they go.