The UBPET Self-Cleaning Litter Box does a great job at reducing odors through frequent cleaning, but the addition of the UBPET Odor Eliminator ensures that the waste bin stays odor-free as well. These deodorizing odor eliminators consist mainly of water, silica gel, inorganic salts, solvents, and composite amino acids. This non-toxic formulation works to break down ammonia and won’t irritate your cat’s senses. One pack contains three odor eliminators which each last up to a month. *Odor eliminators only. The UBPET Self-Cleaning Litter Box is sold separately.