DESCRIZIONE
Device (1) for containing a liquid comprising a sealed and foldable container (4), is characterized in that: the container (4) is flexible, the device comprises a seating surface (3) integral with the entire periphery of the container, - the seat surface (3) is provided at its outer periphery, opposite the container, rigid means (5) forming a frame, the container (4) and the seating surface (3), including the frame (5) of the seating surface, form a foldable assembly which, in the folded or unfolded position out of use, is flat, assembly having a reduced surface in the folded position.