In Czechoslovakia, 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. They formerly 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 range of designs, including bags to be carried at the elbow or on the shoulder, and bags for sporting equipment. 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.
String bags were popular in the USSR where they were called avoska (Russian: авоська), which may be translated as perhaps-bag. The 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 adverbavos' (Russian: авось), an expression of vague expectation of luck, translated in various contexts as "perhaps", "hopefully", etc. The term originated in 1930s in the context of shortages of consumer goods in the Soviet Union, when citizens could obtain many basic purchases only by a stroke of luck; people used to carry an avoska in their pocket all the time in case opportunistic circumstances arose. The exact origin of the term remains uncertain, with several different attributions. 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 script is attributed to Vladimir Polyakov.