Abstract: A basin which stackably interlocks with 20-inch square racks that hold dish and glassware washed in commercial dishwashers. The basin has substantially the exterior configuration of a commercial dishwasher rack and receives a plurality of dishwasher racks slacked above. The basin solid on its base and sides for prohibiting substances which drip down into it from racks stacked above from dripping onto the floor. The basin has circular indentations in the top surface or the base, trapping water and preventing it from sloshing from side to side of the basin when it is carried or moved. The basin may be loaded into a dolly used to transport commercial dishwasher racks, as the dollies typically have an open bottom. Thus, the basin can provide the water-catching function for racks loaded onto a dolly. Grooves in the basin's bottom surface permit stacking on top of a rack or other basins for storage.