Container obtained by blow-moulding or stretch-blow-moulding a plastic preform, provided with a flattened body which extends along a main axis X and which is extended by a bottom at a lower end thereof, the body having a substantially oval shape which extends all the way down to the bottom, the bottom comprising: a. a peripheral seating defining: i. a continuous seating plane, substantially perpendicular to the main axis X of the container, the seating plane being delimited transversely towards the outside, away from the main axis X of the container, by an external perimeter, the seating plane being delimited transversely towards the inside, in the direction of the main axis X of the container by an internal perimeter, the seating plane having an oval contour, the transverse extension A of the seating plane, measured perpendicular to the main axis X of the container at the level of the external perimeter having a maximum A1 and a minimum A2 which are such that A1 is strictly greater than A2, and ii.an internal annular flange which extends axially towards the inside of the container in the continuation of the seating plane, substantially perpendicular with respect to the latter; b. a concave arch which extends from the seating, in the continuation of the flange, towards a central zone; characterized in that: - the height H of the flange, measured axially between the seating plane and the junction between the flange and the arch, and the width L of the seating plane, measured radially between the internal perimeter and the external perimeter are such that: 0.5 ≤ L H ≤ 2.5 - the transverse extension A of the seating plane and the transverse extension B of the body, measured perpendicular to the main axis X of the container at a distance away from the seating plane that is less than or equal to one fifth of the total height of the body, are such that: A B ≥ 0.85 - the height H of the flange has a minimum H1, measured parallel to the maximum transverse extension A1 of the seating plane, and has a minimum H2 measured parallel to the minimum transverse extension of the seating plane, the ratio between which is strictly less than 1, namely: H 1 H 2 < 1 a. a peripheral seating defining: i. a continuous seating plane, substantially perpendicular to the main axis X of the container, the seating plane being delimited transversely towards the outside, away from the main axis X of the container, by an external perimeter, the seating plane being delimited transversely towards the inside, in the direction of the main axis X of the container by an internal perimeter, the seating plane having an oval contour, the transverse extension A of the seating plane, measured perpendicular to the main axis X of the container at the level of the external perimeter having a maximum A1 and a minimum A2 which are such that A1 is strictly greater than A2, and ii.an internal annular flange which extends axially towards the inside of the container in the continuation of the seating plane, substantially perpendicular with respect to the latter; i. a continuous seating plane, substantially perpendicular to the main axis X of the container, the seating plane being delimited transversely towards the outside, away from the main axis X of the container, by an external perimeter, the seating plane being delimited transversely towards the inside, in the direction of the main axis X of the container by an internal perimeter, the seating plane having an oval contour, the transverse extension A of the seating plane, measured perpendicular to the main axis X of the container at the level of the external perimeter having a maximum A1 and a minimum A2 which are such that A1 is strictly greater than A2, and ii.an internal annular flange which extends axially towards the inside of the container in the continuation of the seating plane, substantially perpendicular with respect to the latter; b. a concave arch which extends from the seating, in the continuation of the flange, towards a central zone; - the height H of the flange, measured axially between the seating plane and the junction between the flange and the arch, and the width L of the seating plane, measured radially between the internal perimeter and the external perimeter are such that: 0.5 ≤ L H ≤ 2.5 - the transverse extension A of the seating plane and the transverse extension B of the body, measured perpendicular to the main axis X of the container at a distance away from the seating plane that is less than or equal to one fifth of the total height of the body, are such that: A B ≥ 0.85 - the height H of the flange has a minimum H1, measured parallel to the maximum transverse extension A1 of the seating plane, and has a minimum H2 measured parallel to the minimum transverse extension of the seating plane, the ratio between which is strictly less than 1, namely: H 1 H 2 < 1