A bag, also known regionally as a sack, is a common tool in the form of a floppy container, typically made of cloth, leather, bamboo, paper, or plastic. The use of bags predates recorded history, with the earliest bags being lengths of animal skin, cotton, or woven plant fibers, folded up at the edges and secured in that shape with strings of the same material.
Bags have been fundamental for the development of Civilization, as they allow people to easily collect and carry loose materials, such as berry or food grains, while also allowing them to carry more items in their hands.
The English word probably originates from the Norse word baggi, from the reconstructed Proto-Indo-European bʰak, but is also comparable to the Welsh baich (load, bundle), and the Greek Τσιαντουλίτσα ( Chandulícha, load).
Cheap disposable paper bags and plastic shopping bags are very common, varying in size and strength in the retail trade as a convenience for shoppers, and are often supplied by the shop for free or for a small fee. Customers may also take their own shopping bag(s) to use in shops.
The Australian dillybag is a traditional Australian Aboriginal bag generally woven from . Dillybags were and are mainly designed and used by women to gather and transport food, and are most commonly found in the northern parts of Australia.
Although paper had been used for wrapping and padding in Ancient China since the 2nd century BC,
In medieval Europe, women also wore more ornate drawstring bags, typically called hamondeys or tasques, to display their social status. The 14th-century handbags evolved into wedding gifts from groom to bride. These medieval pouches were embroidered, often with depictions of love stories or songs. Eventually, these pouches evolved into what were known as a chaneries, which were used for gaming or food for falcons. During the Renaissance, Elizabethan England's fashions were more ornate than ever before. Women wore their pouches underneath the vast array of petticoats and men wore leather pockets or bagges inside their breeches. Aristocrats began carrying swete bagges filled with sweet-smelling material to make up for poor hygiene.
An empty bag may or may not be very light and foldable to a small size. If it is, this is convenient for carrying it to the place where it is needed, such as a shop, and for storage of empty bags. Bags vary from small ones, like handbag, to larger ones used for traveling, such as a suitcase. The of clothing are also a kind of bag, built into the clothing for the carrying of suitably small objects.
A bag may or may not be disposable; however, even a disposable bag can often be used many times, for economic and environmental reasons. On the other hand, there may be logistic or hygienic reasons to use a bag only once. For example, a garbage bag is often disposed of with its contents. A bag for packaging a disposable product is often disposed of when empty. Similarly, bags used as receptacles in medical procedures, such as the colostomy bag used to collect waste from a surgically diverted biological system, are typically disposed of as medical waste. Many snack foods, such as pretzels, cookies, and potato chips, are available in disposable single-use sealed bags.
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