This is so cool! This mug just looks like a plain white mug with black hearts; when you put hot liquid in it the ceramic heats up and the hearts change to two different shades of pink! Kind of like a mood ring but there is only one colour - pinkk! I love this; you can buy it for $17.99 at modcloth.com. Kind of pricey, but this would be a great gift for a coffee-loving loved one :) Would you buy this?