Scienceware Molded 100 mm Petri Dish Rack securely holds up to 42 Petri dishes with lids when carrying, incubating or processing samples on the bench top. Up to 4 loaded racks can be stacked together and interlocked to prevent an accidental knock over. Each base area is large enough to be stable but small enough to preserve bench-top space, and provides access slots under the bottom of the dishes for easy removal of a stack. A large center divider incorporates a carrying handle and provides space for labeling. To maintain sterility and to ensure long term durability, all parts are molded of white polypropylene and are steam autoclavable at 121 C. Racks are shipped flat and assemble easily.