Then draw an extended free body diagram for the container with 4 forces : 1 ) the upward normal force exerted by the floor originating from the point of contact between the container and the floor, 2 ) the horizontal friction force exerted by the floor originating from the same point, 3 ) the horizontal normal force ( opposite in direction to force 2 ) exerted by the wall originating from the point of contact between the container and the wall, and 4 ) gravity, originating from the center of mass.
