Metal Engraved "Mike" Steelers Beer Stein

Metal Engraved Beer Stein. Pittsburgh Steelers emblem on front engraved with name "Mike". Name is starting to fade. Men's gift one year but not being used. Only been displayed. Not used to drink from. Not sure exactly what metal made of (not pewter) so not sure what to clean with. Size of mug in pics. No original packaging...read bio Pet friendly home