The present invention relates to a container having a tub body (2; 36) with a bottom (3), a side wall (4), and a lid (5; 37) with top wall (6) and side wall (7). The side walls of both the container and the lid have complementary flanged rims that can fit together by snap engagement with one another. The rim (8) of the body of the container has, in sequence, a first flat flange section (11) extending outwards on the one hand, integral with the side wall (4) of the body of the container and, on the other hand, an inwardly bent section (12) at least partly extending over said flat section (11), an intermediate outwardly convex section (13), a second flat flanged section (14) substantially parallel to the first flat section (11), and a protruding terminal volute-shaped section (15) delimiting an uninterrupted undercut recess (16) with the second flat section (14). The rim (9) of lid (5; 37) has, in sequence, a volute-shaped section (18) being an extension of the side wall (7), a first protruding section (19) designed to engage, in use, with the first flat section (11), an inwardly extending section (20) designed to engage and overlap the inwardly bent section (12), a flat protruding flanged section (21) designed be located at an intermediate area of the outwardly convex section (13), and a flared section (22) ending with a flat flanged section (23) suitable for engaging engage with the undercut recess (16) to form a snap-engaging coupling with a plurality of peripheral uninterrupted sealing areas.