| 摘要 |
Container (1) having a sidewall (5) and a bottom (15), said bottom (15) having an annular seat (17) and a central vault (22) invertible between a lower position, in which the vault (22) protrudes outwards with respect to the container (1), and an upper position, in which the vault (22) protrudes inwards with respect to the container (1) , wherein the sidewall (5) is dimensionally stable, except in an annular groove (10) capable of opening under inversion of the vault (22). |
