The Lixit nursing kit will provide you with everything you need for nursing baby pets that require bottle feeding. Includes three extra nipples and a cleaning brush. Capacity markings on the side ensure accurate measurements of fluid. The cap features textured edges for an easy grip and the nipples are not pre-punched so you can cut them and adjust the flow rate yourself. The bottle is BPA free and made in the USA with quality plastic. 2 Ounce Kit: Has smaller nipples, recommended for puppies, kittens, guinea pigs, ferrets, rabbits, raccoons, squirrels, or other small animals. 4 Ounce Kit: Has larger nipples, recommended for large puppies, monkeys, piglets and other large babies.