Vacuum tube
From Uncyclopedia, the content-free encyclopedia.
A Vacuum tube is a small gas tube with a vacuum inside it. Certain specialized tubes may contain other popular domestic small appliances, such as televisions (normally found in cathode-ray tubes) and microwave ovens (found primarily in magnetron tubes).
A human wouldn't survive in a vacuum, but fortunately vacuum tubes are so small that a human wouldn't fit in one.
Lucky for us.
When broken, the vacuum tubes suck.