Abstract: The vessel includes a small cup (2) made of paper material, having an upper edge (7) formed with a series of folded over peripherally-extending consecutive portions (7a) arranged to define a circumferential engagement groove (9) along the outer edge of the cup, and a laminar support (10) made of stiff paper material and provided with a through hole (10a) to detachably house said small cup at the circumferential groove thereof. Advantageously, the cup (2) is formed with two bun cases (3, 4) introduced into each other upon interposition of a stiff laminar insert (11) disposed intermediate the two bun case bottoms (3a, 4a).