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 flow before feeding,special flutter valve prevents air 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 air flow, eliminating lambs filling up with air and bottle collapsing Easily screws on most bottles including 2-liter bottles Specification: Colour: Red, Yellow Material: Silicone, Plastic Size: Height 6.2cm, diameter 3cm Package Contents: 20 x lamb 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 cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.