lionhead

Corrected entry: When Arthur first arrives on the Heart of Gold, Trillian shows himr where he can get some tea. However, she shows him a machine that gives something from a tube that is almost, but not quite, entirely unlike tea while there is a much better machine standing right next to it that would give you anything you crave just by reading your mind (a bagel, for instance). If Trillian had just shown him that machine, Arthur would have been drinking some good tea. The other machine is therefore totally useless.

lionhead

Correction: Congratulations on completely missing the joke. It's not a plot hole, it's humor.

Phixius