Container made of plastics material, provided with a body and with a bottom in the continuation of the body at a lower end of the body, the bottom having an oblong curved contour and comprising: - a seating surface forming a standing plane of the container, the standing plane having an oblong curved shape extending along a longitudinal median axis and a transverse median axis, the seating surface having a width, with a value w, between its distal ends along the transverse median axis; - an arch extending from the seating surface as far as a central zone of the bottom, the arch delimiting a concavity from the outside of the container; the container having a central axis on which the central zone is centred, characterized in that the seating surface has width reductions that are each situated on one side of the longitudinal median axis, at least at the intersection between the seating surface and the transverse median axis, and in that the arch has, for each width reduction of the seating surface, for the one part, an indentation filling said width reduction of the seating surface and forming a concavity from the outside of the container, and, for the other part, a curved portion extending directly from said indentation in the direction of the central zone, and having, in a section plane passing through the central axis and the transverse axis, a section in the form of a circular arc inscribed in a circle (Cc), the centre of which is situated at a distance, with a value dc, from the central axis along the transverse median axis, with 0.1 w ≤ de ≤ 0.3 w, preferably with de = 0.2 w. - a seating surface forming a standing plane of the container, the standing plane having an oblong curved shape extending along a longitudinal median axis and a transverse median axis, the seating surface having a width, with a value w, between its distal ends along the transverse median axis; - an arch extending from the seating surface as far as a central zone of the bottom, the arch delimiting a concavity from the outside of the container; the container having a central axis on which the central zone is centred, characterized in that the seating surface has width reductions that are each situated on one side of the longitudinal median axis, at least at the intersection between the seating surface and the transverse median axis, and in that the arch has, for each width reduction of the seating surface, for the one part, an indentation filling said width reduction of the seating surface and forming a concavity from the outside of the container, and, for the other part, a curved portion extending directly from said indentation in the direction of the central zone, and having, in a section plane passing through the central axis and the transverse axis, a section in the form of a circular arc inscribed in a circle (Cc), the centre of which is situated at a distance, with a value dc, from the central axis along the transverse median axis, with 0.1 w ≤ de ≤ 0.3 w, preferably with de = 0.2 w. the container having a central axis on which the central zone is centred, characterized in that the seating surface has width reductions that are each situated on one side of the longitudinal median axis, at least at the intersection between the seating surface and the transverse median axis, and in that the arch has, for each width reduction of the seating surface, for the one part, an indentation filling said width reduction of the seating surface and forming a concavity from the outside of the container, and, for the other part, a curved portion extending directly from said indentation in the direction of the central zone, and having, in a section plane passing through the central axis and the transverse axis, a section in the form of a circular arc inscribed in a circle (Cc), the centre of which is situated at a distance, with a value dc, from the central axis along the transverse median axis, with 0.1 w ≤ de ≤ 0.3 w, preferably with de = 0.2 w.