THESE ARE 4 VTG THERMOSERV PLASTIC INSULATED WILDLIFE GEESE BEER STEIN MUGS. THEY WERE USED IN OUR MOTOR HOME AND HAVE THE THERMOSERV LABEL ON THE BOTTOM. THEY ALSO HAVE WHAT I ASSUME IS THE ARTIST NAME RAEDEKE MARKED CLOSED TO THE BOTTOM OF THE MUG. THESE ARE GREAT FOR KEEPING DRINKS COLD OR HOT INSTEAD OF HAVING TO USE A COZY. THEY HOLD 16 OUNCES AND ARE GOOD FOR OUTDOOR DRINKS BECAUSE THEY ARE UNBREAKABLE. THERE ARE NO CRACKS OR CHIPS IN THESE MUGS