This nano vacuum TUBE idea of
yours is really interesting.
The Big Bang Theory Season 7, Episode 7
♪ A cathode ray TUBE
without an electron gun ♪
The Big Bang Theory Season 7, Episode 6
I got a sexy new TUBE top
that says "come hither"...
The Big Bang Theory Season 6, Episode 23
Money Heist Season 3, Episode 3
Vacuum TUBE amp,
which is, by far, the best,
Breaking Bad Season 4, Episode 2