I purchased an all clad sauce pan with the copper bottom the whole pan melted into a squashed looking mess I didnt keep the receipt so they wouldnt even consider returning the pan. I have some all clad pans I have owned for many years and they are the best but this copper bottom pan I have is worthnlessI threw away $250 whatever you do do not buy one of these pans not worth it!!! Dont expect Williams and Sonoma to reinburse you for it if it melts on you like mine did because they wouldn't