Describe: 1.We choose food-grade silicone material for the nipple. The nipples do not have a strange chemical smell. Made with superb craftsmanship. The opening of the nipple is very small. when turned upside down, the milk pours steadily out. When you use this nipple to feed small animals, it will become more efficient. 2.perfect for newborn kittens, bats, rabbits, red squirrels, flying squirrels, newborn kittens, puppies. The base is wide and the length is good for allowing the kitten to be able to latch all the way to their face. 3.This is a feeding tool recommended by many pet charity organizations. This nipple will save many orphaned kittens and puppies who lost their mothers. They can quickly adjust to the sensation of the nipple.