Rubbermaid Coolers - The interior of a cooler is the ultimate breeding ground for microbes, such as stain and odor causing bacteria mold and mildew. But now, you can have a “cleaner cookout” with hard sided coolers from Rubbermaid® that feature exclusive, Microban® antimicrobial protection which helps prevent the growth of bacteria, mold and mildew that can cause stains, odors and the degradation of the cooler.