A cafeteria is a drinking water bottle designed for use by pedestrians, campers, soldiers and workers in the field. These are usually equipped with shoulder straps or a means to tie them to a belt, and may be covered with cloth bags and pads to protect the bottle and isolate the contents. If the padding is immersed in water, evaporative cooling can help keep the bottle content cool. Many canteen also include canteens nesting cup.
Primitive canteen is sometimes made of empty flasks, like pumpkins, or bags made of leather.
Then, the canteen consists of a glass bottle in a wicker basket cover. The bottle is usually covered with a cork stopper.
The mid-1900s design is made of lead, stainless or aluminum-coated steel - with screw caps, caps often secured to bottle necks with short chains or ropes to prevent loss. This is an increase over glass bottles, but undergoes pinhole leaking if dented, crashed or hit a jagged stone.
Contemporary design is almost exclusively made of one of several types of plastic, especially polyethylene or polycarbonate. They are usually light, or lighter than, equivalent to their metal and quite resistant to the development of leaks, even when dropped or bounced badly.
Hunter-gatherers at Kalahari use ostrich eggs as a water container in which they puncture holes to allow them to be used as canteen. The presence of eggshells as it comes from the Howiesons Poort of Middle Stone Age period in Diepkloof Rock Shelter in South Africa shows that canteens are used by humans since 60,000 years ago.
Video Canteen (bottle)
See also
Maps Canteen (bottle)
References
External links
Source of the article : Wikipedia
0 Comments