The Shake Simulator resembles a giant mechanical milkshake. It also has a single door with a window.
Role in episode
The Shake Simulator is first seen put into action when Captain Frostymug wants SpongeBob to experience what a milkshake feels like. He has SpongeBob enter the Simulator, and he sets it to the highest setting: obliterate. The machine shakes SpongeBob around and pours him into a giant glass cup. Unfortunately for Captain Frostymug, SpongeBob enjoys the experience and wants another go at it.
The other settings on the Shake Simulator are "Stir" and "Shake."
The only person to survive the "obliterate" setting is SpongeBob.