Bel-Art Measure-Matic Polypropylene Dispenser; Measures 5 to 25ml (F11654-0000) Measure liquids from 5ml to 25ml just by squeezing the bottle Squeezing forces the desired volume of liquid through the tube and into the cup When pressure is released, excess fluid returns into the bottle for spill free pouring Polypropylene dispensing cup slides onto a polypropylene delivery tube which is set in a low-density polyethylene 500ml (16 oz) storage bottle Supplied hollow stopper serves as a dust cover