The Bratt System was a Swedish system which was used during 1917 - 1955 to control alcohol consumption, by rationing of liquor. Every citizen allowed to consume alcohol was given a booklet called motbok in which a stamp was added each time a purchase on Systembolaget was made. The stamps were based on the amount of alcohol bought. When a certain amount of alcohol had been bought, the owner of the motbok had to wait until next month to buy more. Wine was exempt from rationing.
Named after MD and politician Ivan Bratt, the Bratt system, involving the motbok, was made permanent in 1922 after referendum on a total ban on alcohol had been held. In this vote, a narrow 51% had voted no to banning alcohol sales. Its primary purpose was to decrease the consumption of alcohol. While a motbok owner could buy almost unlimited amounts of wine, spirits were highly restricted.
As of December 31, 1948, the average allowed purchase amount per motbok per month was 1.82 litres of spirits.