The Shake Simulator resembles a giant mechanical milkshake. It also has a single door with a window.
Role in episode
The Shake Simulator was first seen put into action when Captain Frostymug wanted SpongeBob to experience what a milkshake feels like. He had SpongeBob enter the Simulator, and he set it to the highest setting: obliterate. The machine shook SpongeBob around and poured him into a giant glass. Unfortunately for Captain Frostymug, SpongeBob enjoyed the experience and wanted another go at it, upsetting Frostymug.
The other settings on the Shake Simulator are "Stir" and "Shake."