Abstract: A plastic bottle for filling with hot liquid, of the type including a circumferential lateral wall (10), which is incorporated at its lower part to a bottom portion (F) and at its upper part to a neck portion (G) of said bottle. A plurality of grooves (20) are incorporated along the lateral wall (10) and disposed slightly inclined in relation to the longitudinal axis of the bottle and spaced between the bottom portion (F) and the neck portion (G). The grooves (20) are substantially parallel and spaced from each other by panels (11) of the lateral wall (10) and the grooves (20) have a wall thickness which is symmetrical in relation to the respective longitudinal planes of symmetry and which is dimensioned so that the grooves provide a vertical reinforcement, absorb homogeneously and make imperceptible the circumferential thermal and mechanical contractions of the bottle after cooling.