Vehicle bumper

A vehicle comprising;

• a vehicle frame including a first frame rail and a second frame rail each elongated along a vehicle-longitudinal axis;
• and
• a bumper supported by the first frame rail and the second frame rail;
• the bumper including a crossbeam elongated cross-vehicle;
• the bumper including a first crush can and a second crush can;
• the first crush can extending vehicle-rearward from the crossbeam to the first frame rail along the vehicle-longitudinal axis and the second crush can extending vehicle-rearward from the crossbeam to the second frame rail along the vehicle-longitudinal axis;
• the bumper having a topmost surface along the crossbeam, the first crush can, and the second crush can and a bottommost surface along the crossbeam, the first crush can, and the second crush can;
• the crossbeam, the first crush can, and the second crush can having a lattice shape defining cells, at least some of the cells being elongated through both the topmost surface and the bottommost surface;
• the lattice shape having walls bounding the cells;
• in at least a portion of the lattice shape, the walls increasing in thickness in a direction from the crossbeam toward the frame rail;
• the crossbeam, the first crush can, and the second crush can being unitary with each other;
• and
• the crossbeam, the first crush can, and the second crush can being extruded aluminum.