The nipple is also suitable for feeding bottles. You can use this nipple to replace the transparent nipple on the bottle. When replacing, you need to install the nipple from the top of the feeding bottle. After installation, you need to tighten the bottle cap to prevent milk leakage. These nipples have been designed to far outlast other nipples with less chance of small sharp teeth piercing the nipple. These nipples have also been designed to alleviate the chance of an animal swallowing the entire nipple or biting the nipple in half. The kitten bottle is especially suitable for small puppies who do not have the ability to suck, the size of the nipple hole can be tailored to the specific pet, when squeeze the pet nursing bottle the liquid flowing out and then you can feeding animal. The pet nipple is designed for newborn squirrels, bunnies, bats, rabbits, red squirrels, flying squirrels, newborn kittens, chihuahua puppies and animals with a shorter snout, bunnies and animals of such size. Package inlcuded :1 Pack 60ml Puppy Feeding Bottles ;2 Pack 1ml syringes ;2 Pack 5ml syringes;2 Pack 10ml syringes; 10 Pack original nipple; 4 Pack Caps.