The packaging for at least one layer of at least two objects includes in combination an assembled blank produced from a flat blank and a cover which are secured rigidly together head-to-tail, the flat blank including at least one pair of two panels for receiving objects, two external edge panels, at least one pair of two internal spacer panels, at least one of the edge panels and the spacer panels including, on its top, supporting side, its top, supporting folding line, at least one projecting part, at least one of the receiving panels including, next to its bottom folding line, at least one penetrating part, the projecting and penetrating parts being dimensioned and positioned such as to be able, when the blank is assembled, to engage respectively with a penetrating part of another assembled blank located vertically above and with a projecting part of another assembled blank located vertically beneath.