Resuable: Easy to install and clean,Nipples screw easily onto any standard soda bottle,such as bottle, coke bottle, etc Good Design: Tip of nipple can be cut off to increase milk before feeding,special flutter valve prevents intake Wide Application: Designed nipple for feeding orphaned small animal, for cows, sheep and other mammals Specially designed nipple popular for feeding orphaned lambs and samll pet The flutter valve allows , eliminating lambs filling up with and bottle collapsing Easily screws on bottles including 2-liter bottles Specification: Colour: Red, Yellow Material: Silicone, Plastic Size: Height 6.2cm, diameter 3cm Package Contents: 20 x pacifier Note: Cut a small hole on the top of nipple before using Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.