Water Bags
In the so-called “Egyptian Sanitary Self-cooling Water Bag” water is kept cool by the principle of refrigeration by evaporation. A small amount of water exuded by the bag evaporates slowly and keeps the contents cool. Colder water can be obtained by exposing the bag to the air on all sides, as when hung up.
Waterproof folding basins come in weight of seven ounces to fold in one-half inch thickness. One such basin costing sixty-five cents is made of brown waterproof duck; capacity, 1 gallon; diameter, 12 inches; height, 3 inches.
It is bound with linen braid and has a wire rim. A canvas folding bucket which costs ninety-five cents is made of the same material in the same way and with a stout rope handle, with a capacity of three gallons. The diameter of this is 9 inches; the height 12 inches, and the weight 8 ounces.