Little Giant Soda Bottle Lamb Nipple is specially designed to help you effectively nurse lambs, piglets, kids, foals, and other small livestock animals. It is constructed of exceptional rubber formula which guarantees long-lasting quality and improved flexibility. This nipple is soft and flexible with natural-shaped structure that is made for gentle mouths of livestock younglings. It will snugly fit any 20 oz. plastic soda bottle. It measures 0.55 in, diameter by 2.5 in. long with 1.38 in. thumb tab.