I have a relatively cheap stainless steel pot that I use for steaming (the kind of thing you might get at Walmart). Compared to my Quisinart MultiClad Pro it's quite thin and light but I prefer it for steaming because of it's ideal size and lid design features. Unfortunately I have let the pot boil dry a couple times while using it as a steamer am worried that damage to bottom (discolouration that looks like corrosion) might be releasing metallic toxins into my food. I am loath to trash it because I don't think I can find anything quite like it. Does any one know if cheap stainless steel pots have an aluminum core (that damage might expose) or whether there is anything to worry about using it for general cooking when it appears discoloured/corroded.