Everybody loves Christmas jokes. Wearing silly hats, drinking too much eggnog, poisoning your colleagues wait, what? Yup, next time you're doing the coffee run (like, for the millionth time, because nobody else does), get your revenge. Serve them their Americano in this You Have Been Poisoned Skull Mug. You can watch from afar like a creepy stalker as they take their last sip and recoil in horror. Okay, so it doesn't have to be this sinister, but it will sure as hell be funny! Spread the Christmas cheer by making a coffee for everybody in the office. Did somebody say sick day?