A packaging structure for containing, transportation, exhibition, and dispensing of products at points of sale, of a type including a cubical three-dimensional frame formed by four angular beams in a rectangular or quadrangular arrangement, attached on their lower and upper ends by angular crossbeams, generating empty windows on all its faces; the angular beams and crossbeams are made of compressed rigid cardboard and have two equal arms defining an “L”, set with their vortexes facing inside this structure; the structure is set on a base or pallet, that the attachment between the angular beams and crossbeams is made through structural corner joints having an orthogonal square shaped flat surface section with round vortex, an upward projecting and fixating perpendicular tab of a substantially trapezoidal section on each exterior side of the vortex; the tabs and square shaped flat surface include holes through which fixating means are placed in order to attach arms of the beams and crossbeams; a rectangular cavity is made exactly at the exterior corner of the orthogonal square.