SmartyKat Odor Erase Litter Box Odor Absorber rapidly absorbs ammonia for up to 30 days! Peel and stick application for open or hooded litter boxes makes installation and monthly replacements a breeze. Each kit contains two individually packaged Odor Erase sachets and 1 holder with a peel and stick adhesive. With the SmartyKat Odor Erase there is no need to hold your breath while cleaning out the litter box! Odor Erase reduces levels of dangerous ammonia gas. Great for the household and the environment! SmartyKat Litter Accessories: problem solving solutions for a nicer clean up experience. SmartyKat gives pet parents the best of all worlds: SmartyKat products are designed to meet child safety standards and are backed by our 100% satisfaction.