Canteen refers to a small container used by soldiers or campers for carrying water or other drinks.
In British English, canteen commonly means a restaurant provided by an organization such as a company, college, or military unit.
The word "canteen" can also mean:
1. A small store selling snacks, drinks, etc. in a school or workplace
2. A set of cutlery (knives, forks, and spoons) packed in a box
3. A temporary eating place set up during emergencies