Coated or un-coated, teflon or not- it won't matter. Go ahead- ask me how I know ;-) If you use it much for habs, it won't matter how many times it's washed or what it's made of- it will retain heat. We've several sets of stainless steel, teflon, and glass cookware to prove it :-) -Jim C http://www.StepUpForCharity.org Mild to Wild(R)