What goes on under the sea, remains under the sea. Well, this is not quite the case when you take the $11.99 Under the Sea Heat Sensitive Mug into consideration! As its name implies, the various mysteries of the deep do not remain so any longer, as long as you decide to pour in your favorite hot beverage and are able to grab a glimpse at the vibrant life on the sea floor in a comical manner. This is made possible thanks to the thermographic ink used to print the cartoon-like sea life, reacting well to heat, while revealing fun new graphics underneath. Needless to say, as your beverage cools with the passage of time, the graphics too, will revert to their original state.