The production of string bags dates back to 1920s to the town of Žďár nad Sázavou/Saar in former Czechoslovakia, present day Czech Republic, when a salesman Vavřín Krčil, representing Jaro J. Rousek company, began to produce string bags under the trademark Saarense (EKV) at the local chateau Ždár. Previous to this, they made hair nets - which had become obsolete due to shorter hairstyles coming into fashion. This led to years of prosperity for the company. The hand made shopping bags were made of artificial silk yarn, woven by women working at home (this was often their second job) or by using child labour, the finished bags were then given to Vavřín Krčil. The bags quickly became very popular due to their low price, light weight, and compactness. Krčil soon extended the variety of types of the string bags - with special designs for: shopping, walking, elbow bags, shoulder bags, and sports (e.g. bags for tennis and football). In the late 1920s string bags were being produced in Switzerland and Italy, and were distributed around the world. Krčil himself exported the bags to: Canada, France, Switzerland, Germany, Austria and North African countries.
In the USSR
Avoska was a major cultural phenomenon of Soviet daily life. They were manufactured using various kinds of strings. With the advent of synthetic materials, some of them were made of stretchable string, so that a very small net could be stretched to a very large sack.
With the popularization of plastic bags (which had the same important trait of convenient foldability) avoskas gradually went into disuse, but recent political trends banning plastic bags may bring it back.
The name "avoska" derives from the Russian adverb авось, an expression of vague expectation of luck, in various contexts translated "perhaps", "hopefully", etc. The term was introduced in 1930s in the context of shortages of consumer goods in the Soviet Union, when many basic things could have been purchased in a shop only by a strike of luck, and people used to carry an avoska in the pocket all the time. The origin of the term is uncertain, with several different attributions.  In particular, in 1970 a popular Soviet comedian Arkady Raikin explained that around 1935 he introduced a character, a simple man with a netted sack in his hands. He used to demonstrate the sack to the spectators and to say "А это авоська. Авось-ка я что-нибудь в ней принесу" ("And this is a what-iffie. What if I bring something in it..."). The text is attributed to Vladimir Polyakov. 
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- "Little Vera", by Frank Beardow, 2003, ISBN 1860646115, p.40
- Díky Vavřinu Krčilovi se zrodila síťovka, additional text.
- Avoska, Russia Today.
- In California, a Step Toward B.Y.O.B. (Bring Your Own Bag), The New York Times, June 2, 2010.
- "" Sobesednik no. 37 (Russian)
- Literaturnaya gazeta, 1970. no. 14, cited from the Russkaya Rech magazine, 1976, digitized by Google