Denny's Diner 1991 Heat Changing Scrooge Bah Humbug To Happy Holidays Mug

Such a fun vintage collector mug from the famous Denny's Restaurant released in 1991. The mug is color changing and activated when hot beverage is poured in. Goes from Scrooge scowl to a happy smile. 3.75" x 3" 10oz. Excellent pre-owned condition, no chips, cracks, crazing or stains. Very clean! Please view all photos I have listed. Thanks for looking and be sure to check out my other listings for more mugs and other great items!