FIG. 1 is a perspective of a container bottom showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a partial section view of the container bottom of FIG. 3 taken along the line 4—4; and,

FIG. 5 is a partial section view of the container bottom of FIG. 3 taken along the line 5—5.

All sides not shown form no part of the claimed design.

The broken lines shown in the drawing views are included for the purpose of showing an environmental structure that forms no part of the claimed design.