Rube Goldberg lives! I don’t know why, but an engineer has invented a machine that can dunk his teabag automatically.
The teabag is hooked onto a crank and kept in position with a piston-like mechanism so that it’s moved up and down over a strategically-placed mug of hot water. The crank is mounted to copper tubing and chained to a five sprocket cassette that in turn is chained to the shaded-pole motor. Dunking starts when a switch is flicked.
Be sure to watch the video at the link.