A container to be used as an evelope to protect the perimeter of the block formed by multiple panels packaged into the container, for example flat glass panels or panels of other materials to be transported in the vertical position; the container comprises a framework formed by a set of modular troughs, including an upper trough, a lower trough and a pair of identical side troughs, which are essentially composed of longitudinal profiles with a U-shaped cross-section and a narrow width for receiving a multiple panels; these profiles are made of laminated paper or another suitable material, the profiles of the upper trough and lower trough comprising reinforcement zones for binding by means of strips, the reinforcement zones being formed by the juxtaposition of pairs of steel plates on the flat surface of the longitudinal profiles, while the longitudinal profiles of each side trough also receive a protection cover that has a U-shaped cross-section and is made of steel; the flat inside surface of the profiles of the modular troughs receives internal supports for accommodating and protecting the peripheral edges of the multiple panels packaged inside the framework.