I bought this at the vet's office for my dog when he had a skin condition. After using medicated shampoo, I would add this to warm water and pour it over his entire body. It doesn't need to be rinsed off and leaves his fur feeling smooth and not sticky. The unused bottle is 480ml, but I've used it a few times. I'm not sure exactly how much is left, but I think there's more than two-thirds remaining. Since the amount isn't exact, I'd appreciate it if those who are interested in trying it out would consider purchasing it. Thank you for looking.