NURSER BOTTLE - This bottle was designed to promote the natural feeding of Esbilac KMR Goat?s Milk KMR Goat?s Milk Esbilac PetLac or other liquids to small animals. PROMOTES NATURAL FEEDING - Our flexible latex-free nipples simulate the milking action of a mother?s nipple which develops facial muscles and stimulates the normal flow of saliva. Bottle feeding also allows the animal to refuse formula when full. EASY TO USE - Marked with gradations the included bottle makes monitoring food intake easier and helps prevent over or under feeding. DURABLE - This bottle is durable enough to stand up to repeated use and is easy to clean thoroughly with the brush. Bottles and nipples specially designed for small and large neonates: 2 oz. for small neonates and 4 oz. for larger neonates.