Just 20 ounces of this product (one bottle) will treat 100 lbs. of medium size particle, non-scented scoopable litter. To be used with Dr. Elsey’s Ultra Litter. Each bottle contains a free Litter Box Solutions Booklet. Helps Bring Problem Cats Back to the Litter Box, One Bottle Treats 100 lbs. of Litter, Lasts One Cat Over 3 Months.