Q-meieriene is a Norwegian dairy company, controlled by the Kavli Foundation. Earlier this year, probably in the spring, the company introduced a new corporate identity. This includes an updated version of their Q logo as well as fresh and modern packaging.
Norwegian agency Strømme Throndsen Design have designed new milk cartons for Q-meieriene; I don't know if they were also behind the overall corporate identity.
The image above shows how different products are colour-coded. Product names are set in St Ryde Medium. The "wallpaper" below was created by a Swedish illustrator named Lars Rehnberg and can be seen on the top of the milk cartons.
Strømme Throndsen Design
Strømme Throndsen Design blog