The bulletin board is made of light tan cork and the border of the board is made of bamboo.
Role in episode
SpongeBob pulls out a cork board that Mr. Krabs previously used to display all of his "memos." It soon becomes a popular place to write reviews about the Krusty Krab. However, people start to bully each other using the board, mainly by P-Star7. When it starts gathering negative reviews about the restaurant, Krabs destroys the board because it is losing him money.