A store or cafeteria, often in a military base or workplace, where food and supplies are sold; or a small metal container for carrying drinking water.
From French 'cantine' and Italian 'cantina' (wine cellar), originally referring to a wine merchant's shop. The term evolved to mean any supply store, then a food service facility.
The 'canteen' as a water bottle became iconic through soldiers in the American Civil War (1861-1865), each carrying a metal canteen that doubled as both container and cup. This simple design lasted unchanged for 150 years until plastic bottles arrived, showing how military necessity drives innovation that then spreads to civilian life.
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