Container with a reinforced base and method for manufacturing such a container

A container (1) obtained by blow molding or stretch-blow molding from a parison (2) of plastic material, said container (1) comprising:

• a neck (3), a bottom (7), and a body (6) between the neck (3) and the bottom (7) and connecting the neck (3) with the bottom (7), the neck (3) the body (6) and the bottom (7) jointly delimiting an inner primary volume (11) of the container (1);
• and
• a base (12) projecting from a joining area (8) where the body (6) joins with the bottom (7), the base (12) formed of a fold of material that includes an outer wall (13) formed from an extension of the body (6), and an inner wall (14) formed from an extension of the bottom (7),
• the base comprising a skirt (15) where the outer wall (13) and the inner wall (14) extend from the joining area and are in mutual contact with each other, and a foot (16) that extends from an end portion of the skirt (15) and contains a hollow bulge in which an air bubble is trapped, the foot (16) defining a standing plane (17) for the container (1),
• wherein the inner and outer walls (13, 14) are welded to one another at a portion of the skirt (15) between the joining area (8) and a junction of the skirt (15) with the foot (16), and
• wherein the bottom (7) of the container, from the joining area (8) to a central area (10) surrounded by the joining area (8), forms an arch that is concave facing an interior of the container.