This is a potion shop located at what used to be a dead end hallway.

Here is the list of it's products:

  • Fortify Perception
  • Fortify Strength
  • Healing
  • "Happy" Potion (commonly used to give interns a false sense of happiness)
  • Dragon's Breath
  • Werewolf
  • Popcorn (salted or unsalted)
  • Kettle Corn
  • Parmesan Popcorn
  • Spicy Popcorn
  • Mangos & Mango Juice

It's manned by a man in a red & white striped suit and a gas mask. The room behind the shack is the teleporter room, and also serves as a shipping dock for the shop.

The original post describing it can be seen here.[1]