disclosed is a container made of plastics material , which is provided with a body and a bottom that extends from a lower end of the body , the bottom including : a peripheral base that defines a setting - down plane ; a concave vault which extends from a central area , forming a peg that projects towards the inside of the container , to the base ; a set of main reinforcing grooves which extend radially from the central area as far at least as the base , wherein , in the container , the vault has a central region , a median region and a peripheral region that are each separated by an internal axial indentation and an external axial indentation which extend annularly in a continuous manner around the central area .