FIG. 1 is a perspective view of a frame structure for containers showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a perspective view thereof, shown in an environment of use.
The broken lines in FIG. 8 are shown for the purpose of illustrating exemplary environmental subject matter and form no part of the claimed design.