A bottle made of polymer material includes a base provided with a plurality of ribs. Each rib is composed of a curvature of the base of the bottle which forms a protuberance in the longitudinal direction directed towards the inside of the bottle. The ribs extend in a radial direction along a line of radial extension. The bottle is characterized in that the projection, in a transverse plane, of the line of radial extension of at least one of said ribs is curved.