FIELD: package and storage.SUBSTANCE: present invention relates to a method for acquiring a group of irregular tetrahedral packages (1a, 1b) having a first orientation and a mirror second orientation, wherein said packages (1a, 1b) comprise two panels (5, 6), which are isosceles rectangular triangles, two elongated panels (7, 8), which are rectangular triangles. Method includes the steps of creating L-shaped blank (10) comprising rectangular central wall (15), rectangular right wall (13) and rectangular left wall (14), wherein right wall (13) and left wall (14) are fixed to the adjacent edges of central wall (15) through attenuation lines (11, 12), placing one package (1a) with a first orientation and one package (1b) with a second orientation on each of right wall (13), left wall (14) and central wall (15), all the packages (1a, 1b) are arranged so that panel (5, 6) with the shape of the isosceles right triangle faces cardboard blank (10), and the hypotenuse of said panel is directed to central angle (16), b
