In Austria, the term used in the Weinviertel region (dialectal Köllakörbl, Köllazega, Köllazäga, Kellerzeger - Zeger or Zäger = small bag, pouch) refers to a sealable tubular container, usually made of leather or straw. Wine bottles were transported with it (mostly so called Doppler = two-liter bottle). Another possibility of transport was as a bag on the inside of the winegrower's jancker (jacket). See also under customs in viticulture.
Source: Glossary of cellar lanes
As honorary chairman of the Domäne Wachau, it is the easiest and quickest way for me to access the wein.plus encyclopaedia when I have questions. The certainty of receiving well-founded and up-to-date information here makes it an indispensable guide.
Hans-Georg Schwarz
Ehrenobmann der Domäne Wachau (Wachau)