My favorites are in Asimov. In the Foundation series, one product the traders sell is a nuclear powered ash tray. They employ advanced nuclear plasma manipulation to...quickly atomize cigarette butts.

Or the time there's this couple. They are traveling to another planet, and they get aboard their personal interstellar spaceship. The society is advanced enough, that that is just something you can own.

What happens as soon as they get onboard their personal FTL interstellar ship? The husband commands his wife to get dinner started.