Enjoy a cup of coffee and make everyone smile with Joey’s popular pick up line! This heat change mug features the everyone’s favorite line ‘How you doing?’ emblazoned on its side when hot. When cold the mug is black featuring only the Friends logo. Once you’ve poured in your favorite hot beverage the mug turns green and Joey’s pick up line appears with the instantly recognizable New York skyline in the background. The Friends How You Doin Heat Change 11 oz. Mug makes a great gift for Joey fans, and lovers of the show in general. Hand wash only. Not dishwasher safe. Do not microwave.