an integrally - formed plastic basket , moldable in a two - piece injection mold , combines light weight , strength , and large carrying capacity . thin side walls with a draft no greater than 3 ° are formed with overlapping cross - members . between a pair of unslotted , substantially planar cross - members is a slotted , corrugated cross - member . interior slots are formed by the core die of the injection mold , while exterior slots are formed by the cavity die .