1、Made of premium rubber material, can be installed in the feeding bottle and other equipment, so that the calf can feel like drinking milk from the mother. 2、Safe, non-toxic, and practical to use. 3、Help the calf drink milk in a natural speed, produce a lot of saliva, help digestion. 4、Intermittent feeding to avoid foreign body pneumonia. 5、Please clean the left milk, should be washed in water and acid, lye or disinfectant every week. Features: Made of premium rubber material, can be installed in the feeding bottle and other equipment, so that the calf can feel like drinking milk from the mother. Safe, non-toxic, and practical to  use. Help the calf drink milk in a natural speed, produce a lot of saliva, help digestion. Intermittent feeding to avoid foreign body pneumonia. Please clean the left milk, should be washed in water and acid, lye or disinfectant every week. Specification: Condition: 100% Brand New Material: rubber Color: red Length: approx. 10.7cm/4.2inch Diameter: 6.2cm/2.4inch Package list: 5 * Calf Pacifier