http://www.petco.com/petco_page_pc_stainlessbowlnotice.aspxPetco has determined that one of its foreign suppliers used stainless steel mistakenly containing small quantities of Cobalt-60 when fabricating certain orders of certain SKUs/models of stainless steel pet food bowls. Cobalt-60 is a radioactive material commonly used in industrial gauging equipment and other uses.