Sly students with a knack for potions end up in Slytherin House, formerly under the tutelage of Severin Snape. This Slytherin Crest Mug with Coaster ? Harry Potter by Our Name Is Mud ? 6003593 mug captures the serpent mascot and greenhouse color of the sneakiest wizards and witches at Hogwarts School of Wizardry and Witchcraft. A matching Argyl coaster keeps stains off furniture as you brew up your favorite potion for tea.