Shopping bags are medium sized bags, typically around 10-20 litre

Litre

pic|200px|right|thumb|One litre is equivalent to this cubeEach side is 10 cm1 litre water = 1 kilogram water The litre is a metric system unit of volume equal to 1 cubic decimetre , to 1,000 cubic centimetres , and to 1/1,000 cubic metre...

s (2.5 to 5 gallons) in volume

Volume

Volume is the quantity of three-dimensional space enclosed by some closed boundary, for example, the space that a substance or shape occupies or contains....

 (though much larger versions exist, especially for non-grocery shopping), that are often used by grocery shopper

Shopper

Shopper may refer to:*Personal shopper*Computer Shopper *Window Shopper*Secret shopper *Euro Shopper*Happy Shopper*A newspaper that contains only or mainly advertising...

s to carry home their purchases. They can be single-use (disposable), used for other purposes (storage, can liners, etc) or designed as reusable shopping bag

Reusable shopping bag

A reusable shopping bag, sometimes called bag for life is a type of shopping bag which can be reused several times: this is an alternative of single use paper or plastic bags...

s.

Shopping bags were first invented in the year 1912 and completed in the year 1915. It was invented by Walter H. Deubner who was a grocer in St. pual Minnesota.

Environmental concerns

Heavy duty multiple-use shopping bags are often considered environmentally better than single-use paper bag

Paper bag

A paper bag or paper sack is a preformed container made of paper, usually with an opening on one side. It can be one layer of paper or multiple layers of paper and other flexible materials. A bag is used for packaging and/or carrying items....

s or plastic shopping bag

Plastic shopping bag

Plastic shopping bags, carrier bags or plastic grocery bags are a type of shopping bag made from various kinds of plastic, and are common worldwide. These bags are sometimes called single-use bags, referring to carrying items from a store to a home...

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