Harry Potter A5 Tin Sign (Potions)
 
Potions was predominantly taught by Slytherin, Professor Severus Snape until Horace Slughorn returned to Hogwarts in The Half-Blood Prince.
 
This tin sign proudly boasts imagery of cauldrons and other magical artefacts youo'd find in the Potions dungeon and wouldn't be out of place fitted to the door to the classroom.
 
Officially Licensed Harry Potter Merchandise