World War I
In 1914 World War I started, which stopped brewing in Saku and all other breweries until 1921. Although at the beginning of 1920 there were 9 breweries in Estonia, Saku soon became a monopoly brewery in North Estonia. However, at the same time Saku Brewery stood out due to its innovations. In 1928, Saku introduced the 0.5 litre beer bottle to replace the half toop (1 toop = 1.23 litres) bottle used so far.

World War II
In 1940, due to the Soviet occupation, Saku Brewery as well as all other companies, was nationalized. Production in the company continued in Soviet conditions.
Soviet times
We remember from the Soviet times Žiguli beer and the legendary Kuldne Oder (golden barley) sold in brown and green bottles. The moer experienced men always knew to choose the beer in the brown bottle, because with this there was a higher chance that the beer was of decent quality. In 1976, Saku Brewery became an experimental brewery, which meant various benefits and advantages, i.e. in the form of investments. In 1985, Saku Brewery survived the second prohibition after World War I, this time enforced by M. Gorbachev. The investments into the renewal of Saku Brewery were stopped.