Translucent plastic for better visibility of liquid contents. Secure O-Ring inside the blue cap prevents leaks. 16 oz (500 mL) capacity. Easy to read measurements. Printed ink on one side with molded graduations on the opposite side. Fits authentic screw-on Pritchard teats. Easy to clean 2" wide-mouth opening for cleaning by hand with a brush or in a dishwasher. For livestock use only. Easy to clean, wide-mouth plastic bottle for feeding orphan lambs or goat kids.