Foldable package with simplified shaping

A package comprising a case defining a stowing volume, and a cover intended to close the stowing volume of the case, the case having a bottom and a peripheral rim comprising:

• a first panel;
• a second panel;
• a third panel opposite the first panel;
• a fourth panel opposite the second panel,
• the first panel, the second panel, the third panel and the fourth panel can adopt:
• a stowed position in which each of the panels extends substantially parallel to the bottom;
• a use position in which each of the panels extends substantially perpendicular to the bottom;
• wherein the case comprises a rigid element connected to the first panel and to the third panel by an elastic connection, the rigid element being movable between:
• a storage position of the case corresponding to the stowed position of the panels of the peripheral rim, in which the rigid element is located near the bottom;
• a use position of the case corresponding to the use position of the panels of the peripheral rim, in which the rigid element is spaced from the bottom,
• the elastic connection tending to displace the rigid element from its storage position to its use position.