Shopping bag

Shopping bags are medium-sized bags, typically around 10–20 litres (2.5–5 gallons) in volume (though much larger versions exist, especially for non-grocery shopping), that are often used by grocery shoppers to carry home their purchases. They can be single-use (disposable), used for other purposes (storage, can liners, etc.) or designed as reusable shopping bags.

Types and typical use of shopping bags vary by country:

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Wikipedia