(4) gallon containers. LIQUID ALIVE® Odor Digester contains enzyme producing bacteria that digests malodors and waste caused by dampness, mildew, mold, food, urine, vomit, fecal and organic matter. Can be used on carpet, upholstery, concrete, cinder block, porous surfaces, grout joints, painted surfaces, garbage cans and trucks, waste containers, mattresses and all water-safe textiles, linens and surfaces. Non-Pathogenic, Biodegradable, and non-toxic to animals and humans. Contains enzyme producing bacteria that digests malodors and waste.