sentences:  The goal was to provide optimal food safety, hygiene, and distribution efficiency using minimal material, in accordance with the belief that a package should "save more than it costs".The new package had to be sufficiently cheap to be able to compete with loose milk, meaning that a minimum of material waste and a maximum of production efficiency needed to be obtained.In 1943, the Åkerlund & Rausing lab started to work on developing the milk carton, and, in 1944, came up with the idea of constructing a tetrahedron-shaped package out of a tube of paper.