All Odorzout products are Made in the USA. We “THINK GREEN” by using recycled plastic for our bottles and recycled paper in our labels. As long as you keep the lid closed, the product will stay fresh forever. Just sprinkle lightly, a little bit of Odorzout Cat Litter Additive Powder underneath your litter and a little on top, any time you add or change your litter. Your cat won’t even know it’s there since Odorzout products have no odor of their own. This product does not cover up or mask the odors with another odor, it absorbs and eliminates it. If you have need for cat odor removal or cat urine odor removal from you litter box, you need this product. This product will work with any kind of litter from clay, to pearls,clumping, paper, makes no difference, this product added to your litter will be a blessing. Odorzout Cat Litter Additive Powder can also be used directly on a pet. This product is great to remove odors off of dogs, ferrets and more. When sprinkled lightly, your pet won’t even notice it on them. If they do lick it or eat it, it’s 100% safe for pets and people too. Odorzout Cat Litter Additive Powder is strong enough to eliminate skunk odor off of an animal. That is the only time we recommend to use heavily and pack it on the pet. Leave the Odorzout Cat Litter Additive Powder on for an hour, brush out and repeat as necessary. Once the odor is gone, brush out and shampoo to remove any residue. Odorzout Cat Litter Additive has saved many cats from using up their “Nine Lives”and helped save many a marriage!