There are so many desert water bags. They have different volume because of varies size. But mostly the volume of desert water bags is between one and two quarts. These bags are very convenient and useful in arid desert climates because desirt water bags could maintain water cool to make it is easy to drink. If you want to go out in the desert for a long time, you could not miss this kind of products.

Identification
Desert water bags usually have shoulder straps for portability. And there is one aluminum cap or plastic cap on the upper corners. Desert water bags are usually made out of canvas, as canvas material helps maintain the cool and refreshing qualities of water. In these years, more and more desert water bags are make of plastic bag. 

Warning
Desert water bags are used only for Marines and solders working in desert operations, so they can hardly used in chemical or biological warfare atmospheres. The reason is that desert water bags are highly porous and they also lack gas-mask drinking tube attachments. In these situations, traditional military canteens are used for water storage.

Significance
A lot of people attach desert water bags on the front bumpers of their vehicles while traveling. Some people, however, place them on the front of the radiators. The handles of canvas desert water bags will often be seen hanging from radiator ornaments towards the front of vehicles. This is because during driving, the air that passes will keep the water nice and cool.

Theories/Speculation
If you are interesting in purchasing a desert water bag of your own, there are several places on the Internet to find them. They are often available for sale on this website (http://en.yulipackage.com)! Many of the desert water bags are canvas bags that were made in the 1950s. They are generally sold cheaply, anywhere between $5 and $30. You can also choose to buy new design of desert water bag which is made of plastic.

Benefits
Desert water bags are effective because they effectively keep water cool and appetizing to drink, especially on a hot day in the dry desert. Water kept in canteens will be warm or hot, and definitely won't quench your thirst in the same way. Desert water bags consists of skins that evaporate and cold water to keep the inner body core cool.