Feeling murderous in the morning? Get out your Dexter blood-splattered mug and let the caffeine from a hot cup of coffee warm you up and restore your civilized side. This diabolical mug shows the two sides of Dexter: when cold, it is covered with blood, just like a newly discovered Florida crime scene; when hot, the blood disappears, leaving a grinning Dexter, who's in on all your secrets.