Tube

A tube is hollow cylindrical shape.

A collapsible tube is used as package for e.g. toothpaste, skin care products, shoe-polish and some foods, e.g. cheese. As a gimmick there are also tubes with alcoholic and non-alcoholic beverages.

Surfer laying down in the tube

For related terms see:

Cathode ray tube / Electron tube
Inner tube
Test tube
Vacuum tube (or Thermionic valve)
London Underground ("The Tube")
Tube computer bus
TUBE (Japanese pops musician)

In surfing, the inside of a hollow wave is known as a tube.

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